PLSIC's Preferred Vendor Partner program is the founding-cohort entry point into the contractor channel. Listed gets you in front of the searchable directory. Partner adds the engagement surfaces. Elite is category-exclusive with a structured input track on the standards your category depends on.
The contractors who buy from you organize, train, certify, and write the standards inside PLSIC. The PVP program is the relationship between PLSIC and the vendors who supply that work.