An s.53 scheme (PSA93, s.53) is an occupational pension scheme that used to be contracted out and still has a guaranteed minimum pension scheme or protected rights. An s.590 scheme (ICTA88, s.590) is an occupational scheme that gets mandatory approval. An s.608 scheme is an occupational scheme approved before 6 April 1980 but not approved under the new code. Consequently no contributions have been made since 1980.