If you are planning to self-install on your own property, the Adjustable Block Program Guidebook specifies in Section 4:

"Exceptions will be considered for self-installing a system on one’s own property without being an ICC Certified DG Installer, provided that the self-installer submits one of the following proving that they are a Qualified Person: 1) a notarized attestation that they have completed at least five solar project installations prior to the application(s) submitted to the Program; or 2) a certificate of completion for one of the training programs noted in the definition of “Qualified Person” below. Exceptions will be granted at the sole discretion of the Program Administrator.

"'Qualified person' means a person who performs installations on behalf of the certificate holder and who has either satisfactorily completed at least five installations of a specific distributed generation technology or has completed at least one of the following programs requiring lab or field work and received a certification of satisfactory completion: an apprenticeship as a journeyman electrician from a DOL registered electrical apprenticeship and training program; a North American Board of Certified Energy Practitioners (NABCEP) distributed generation technology certification program; an Underwriters Laboratories (UL) distributed generation technology certification program; an Electronics Technicians Association (ETA) distributed generation technology certification program; or an Associate in Applied Science degree from an Illinois Community College Board approved community college program in the appropriate distributed generation technology. To be considered a "qualified person", the experience and/or training relied upon must be with the same type of distributed generation technology for which the qualification status is sought."

In addition, in order to apply for the SREC program, you must utilize an Approved Vendor. You can find a list of Approved Vendors here. If you are completing the installation yourself, you will most likely want to use an Approved Vendor with the type "SREC Broker/Aggregator".