Synopsis As Introduced Amends the Illinois Power Agency Act. Provides that not less than 30 calendar days before a required demonstration of compliance (rather than within 45 days after the effective date of the relevant Act), an alternative retail electric supplier or its successor may (rather than shall) submit an informational filing to the Illinois Commerce Commission certifying that the alternative retail electric supplier owned or operated one or more electric generating facilities that generates renewable energy resources and the facilities generate one renewable energy credit for each megawatthour of energy produced from the facility. Provides that a distributed renewable energy generation device or a community renewable generation project shall be considered owned or operated by the entity with a contractual right to any renewable energy credits generated. Provides that the Illinois Commerce Commission shall maintain the confidentiality of all facility-specific information, whether or not requested by an alternative retail electric supplier. Effective immediately or on the date specified provisions of Public Act 99-906 take effect, whichever is later.