Yes, members may not work in a PSA unless the company is signatory to the Commercials Contract. If the union has approved the commercial as a PSA, the session fee and Pension & Health contributions must be paid. However, residuals are waived for a one-year period as long as the performer agrees to such terms. Use for each additional one-year period requires the written consent of both the performers and the union. For these extensions, the performer may (but is not required to) waive additional payment. The producer may not request a use period longer than one year at the time of the original session.