Section 757.394 - Renewable natural gas programs; rules; requirements(1) The Public Utility Commission shall adopt by rule a large renewable natural gas program for large natural gas utilities pursuant to the provisions of ORS 757.396.(2) The commission shall adopt by rule a small renewable natural gas program for small natural gas utilities pursuant to ORS 757.398.(3) Rules adopted by the commission under this section shall include: (a) Rules for reporting requirements under the large renewable natural gas program and the small renewable natural gas program; and(b) Rules for establishing a process for natural gas utilities to fully recover prudently incurred costs associated with the large renewable natural gas program and the small renewable natural gas program.(4) Rules adopted by the commission under this section may not prohibit an affiliated interest of a small natural gas utility or of a large natural gas utility from making a capital investment in a biogas production project if the affiliated interest, as defined in ORS 757.015, is not a public utility.