Supplements, as defined in subdivision 5(b) of section 220 of the Labor Law, may include, but are not necessarily limited to, medical, dental or hospital care, pensions on retirement or death, compensation for injuries or illness resulting from occupational activity, or insurance to provide any of the foregoing, unemployment benefits, life insurance, disability and sickness insurance, accident insurance, vacation and holiday pay, costs of apprenticeship or training or other similar programs, but only where the contractor or subcontractor is not required by other Federal, State or local law to provide such benefits.