
    ATTORNEY GENERAL v PUBLIC SERVICE COMMISSION THE DOW CHEMICAL COMPANY v PUBLIC SERVICE COMMISSION
    Docket Nos. 63002, 63003, 63010, 63540.
    Submitted February 7, 1984, at Lansing.
    — Decided August 8, 1984.
    Leave to appeal denied, 422 Mich —.
    In Docket Nos. 63002, 63003 and 63540, the Attorney General appealed from orders of February 18, 1982, and March 24, 1982, of the Ingham Circuit Court, Robert Holmes Bell, J., which affirmed seven Public Service Commission orders granting rate relief to Consumers Power Company. In Docket No. 63010, Dow Chemical Company appealed from a February 18, 1982, order of Judge Bell which affirmed the July 31, 1978, order of the commission which established an "Other Operations and Maintenance Expense Indexing System”. The appeals were consolidated by the Court of Appeals. Held:
    
    1. The Public Service Commission has ■ authority to issue annual orders allowing electricity rate increases or decreases based on changes in the system availability without holding a full and complete hearing each year as is done in a main rate case when the single-factor hearing was anticipated and provided for in the principal rate case and order.
    2. The Public Service Commission has the statutory power to index rate adjustments for operation and maintenance expenses of public utilities to the National Consumer Price Index. Such indexing does not constitute an unconstitutional delegation of rate-setting power.
    3. The Public Service Commission may lawfully establish differential monthly service charges for residential customers _for principal residences and for alternate residences. Such a service charge differential does not violate the statute prohibiting discrimination between customers receiving like contemporaneous service rendered under similar circumstances and conditions.
    
      References for Points in Headnotes
    [1, 3] 64 Am Jur 2d, Public Utilities §§ 242, 244, 266.
    Validity of “fuel adjustment” or similar clauses authorizing electric utility to pass on increased costs of fuel to its customers. 83 ALR3d 933.
    [2] 64 Am Jur 2d, Public Utilities § 240 et seq.
    
    [3] 64 Am Jur 2d, Public Utilities § 117 et seq.
    
    [4] 64 Am Jur 2d, Public Utilities § 158.
    [5] 64 Am Jur 2d, Public Utilities §§ 89, 276 et seq.
    
    
      4. The Public Service Commission, in setting a working capital allowance to be included in an electric rate base, need not base its determination on the amount of working capital shown on the company’s books.
    5. The commission’s order granting interim rate relief to Consumers was lawful and reasonable.
    6. Rate making is a legislative function and the Legislature has entrusted the implementation of this legislative function to the administrative expertise of the Michigan Public Service Commission. Legislative policy determinations by the Public Service Commission, properly made, are not reviewable by the courts.
    Affirmed.
    1. Public Utilities — Rate Adjustments — Hearing.
    The Public Service Commission has authority to issue annual orders allowing electricity rate increases or decreases based on changes in the system availability without holding a full and complete hearing each year as is done in a main rate case when the single-factor hearing was anticipated and provided for in the principal rate case and order.
    2. Public Utilities — Rate Adjustments — Indexing — Constitutional Law.
    The Public Service Commission has the statutory power to index rate adjustments for operation and maintenance expenses of public utilities to the National Consumer Price Index; such indexing does not constitute an unconstitutional delegation of rate-setting power.
    3. Public Utilities — Differential Charges — Residential Customers.
    The Public Service Commission may lawfully establish differential monthly service charges for residential customers for principal residences and for alternate residences; such a service charge differential does not violate the statute prohibiting discrimination between customers receiving like contemporaneous service rendered under similar circumstances and conditions (MCL 460.557; MSA 22.157).
    4. Public Utilities — Working Capital Allowance.
    The Public Service Commission, in setting a working capital allowance to be included in an electric rate base, need not base its determination on the amount of working capital shown on the company’s books.
    5. Public Utilities — Appeal.
    Rate making is a legislative function and the Legislature has entrusted the implementation of this legislative function to the administrative expertise of the Michigan Public Service Commission; legislative policy determinations by the Public Service Commission, properly made, are not reviewable by the courts.
    
      Frank J. Kelley, Attorney General, Louis J. Caruso, Solicitor General, and Hugh B. Anderson, Assistant Attorney General, for the Attorney General.
    
      Conner, Harbour, Dew, Stringer & Olsen (by Pat D. Conner), and Thomas J. Cresswell and John DeMeester, of counsel, for the Dow Chemical Company.
    
      Don L. Keskey and Leo H. Friedman, Assistants Attorney General, for the Public Service Commission.
    
      Loomis, Ewert, Ederer, Parsley, Davis & Gotting (by George W. Loomis, Harvey J. Messing, Michael G. Oliva and James A. Ault), and Lawrence B. Lindemer, Allen B. Bass and David A. Midelonis, for Consumers Power Company.
    Amicus Curiae:
    
      Hill, Lewis, Adams, Goodrich & Tait (by Douglas H. West), for the Association of Businesses Advocating Tariff Equity.
    Before: Cynar, P.J., and J. H. Gillis and R. C. Anderson, JJ.
    
      
       Circuit judge, sitting on the Court of Appeals by assignment.
    
   Per Curiam.

In Docket Nos. 63002, 63003 and 63540, the Attorney General appeals as of right from orders of February 18, 1982, and March 24, 1982, of Ingham County Circuit Court Judge Robert Holmes Bell which affirmed seven Michigan Public Service Commission orders granting rate relief to Consumers Power Company. In Docket No. 63010, Dow Chemical Company appeals as of right from a February 18, 1982, order of Judge Bell which affirmed the July 31, 1978, order of the commission which established an "Other Operations and Maintenance Expense Indexing System” (Other O & M Indexing System). These appeals raise seven issues which will be discussed seriatim.

The first issue raised by the Attorney General challenges the legality of the "System Availability Incentive Provision” (SAIP). This panel has recently found a similar provision concerning The Detroit Edison Company lawful in Attorney General v Public Service Comm #2, 133 Mich App 790; 350 NW2d 320 (1984). We adopt here what we said there, and affirm.

The second issue challenges the legality of the Other O & M Indexing System. This issue was also recently addressed by this panel in the case of Attorney General v Public Service Comm #1, 133 Mich App 719; 349 NW2d 539 (1984). We find this issue to be without merit for the reasons given in that opinion.

In his third issue, the Attorney General contends that the differential monthly service charges for residential customers for "principal” residence and for "alternate” residence established by the commission in its July 31, 1978, final rate order in Case No. U-5331 constitutes unlawful rate discrimination.

We find this issue to be without merit. The findings of the commission in support of this portion of that order are sufficiently well supported by evidence in the record, as found by Judge Bell. The service charge increase does not violate MCL 460.557; MSA 22.157 because that section only prohibits discrimination between customers receiving "like contemporaneous service rendered under similar circumstances and conditions”. We find record support for the commission’s finding that the providing of electric service to a temporary, alternate or seasonal residence is different from providing service to a permanent resident, with respect to their use of energy, and the yearly amount of energy consumed. We agree with the commission that giving this class of customers different rate treatment in order to equitably apportion the cost of providing electric service does not constitute unlawful discrimination.

In his fourth issue the Attorney General argues that the commission erred in its final order of Case No. U-5331 of July 31, 1978, by including in the electric rate base a "working capital allowance” of $108,946,000, arrived at by use of a formula involving one-eighth of annual operating and maintenance expenses. He argues that the "allowance” should be based instead on the actual amount of working capital shown on the company’s books for the prior year.

We find this argument to be without merit for the reasons given in the case of Attorney General v Public Service Comm #2, 136 Mich App 515; 358 NW2d 351 (1984), and for the reasons given by the commission and by Judge Bell in his opinion of February 18, 1982.

In his fifth issue, the Attorney General argues that the commission acted unlawfully on March 3, 1978, in Case No. U-5331, in granting interim rate relief in the amount of $15,212,000 to Consumers because, he alleges, the order failed to explain why interim relief was granted and why emergency relief was needed. We disagree, and find the order to be both lawful and reasonable. Attorney General v Public Service Comm, 63 Mich App 69; 234 NW2d 407 (1975), lv den 395 Mich 779 (1975); City of Grosse Pointe v Public Service Comm, 93 Mich App 596, 598; 287 NW2d 1 (1979), and Great Lakes Steel Division of National Steel Corp v Public Service Comm, 416 Mich 166; 330 NW2d 380 (1982). The issue is without merit.

Finally, the Attorney General requests that this Court order refunds to customers to be determined on remand by the Ingham County Circuit Court. We decline to address this issue for the reason that we find the orders appealed from to be lawful and reasonable.

In summary we affirm Judge Bell’s orders in all respects.

In Docket No. 63010, Dow Chemical Company argues that the surcharge mechanism incident to the Other O & M Indexing System in MPSC Case No. U-5331, dated July 31, 1978, is unjust and discriminatory in its impact upon "high load factor” ' customers. Dow argues that the indexing system is defective in its impact upon such customers because the commission refused to admit into the record evidence of cost responsibility and because the order fails to explain why its rate design is reasonable, thus violating MCL 24.285; MSA 3.560(185).

We have elsewhere upheld the Other O & M Indexing System. See above. We agree with the commission that it is vested with complete power to regulate utilities and utility rates, MCL 460.6; MSA 22.13(6) and MCL 460.552; MSA 22.152, and that the uniform kilowatt hour (kwh) surcharge question is clearly a legislative determination, which involves judgment and discretion on the part of the commission. It results in all customers paying the same charge per kwh and is not discriminatory. Legislative policy determinations by the commission, when properly made, as this one was, are not reviewable by the courts. The Detroit Edison Co v Public Service Comm, 82 Mich App 59, 67; 266 NW2d 665 (1978), and the cases cited therein. See, also, Michigan Consolidated Gas Co v Public Service Comm, 389 Mich 624, 644-645; 209 NW2d 210 (1973) (Williams, J., dissenting). Likewise we find that the findings of the commission at pages 114-122 of its opinion and order of July 31, 1978, fully satisfy the requirements of MCL 24.285; MSA 3.560(185). This issue is without merit.

Affirmed.  