It shall be unlawful directly or indirectly to impose unreasonable restrictions on the motor vehicle dealer or franchisee relative to transfer, sale, right to renew, termination, discipline, noncompetition covenants, site-contract whether by sublease, collateral pledge of lease, or otherwise, right of first refusal to purchase, option to purchase, compliance with subjective standards and assertion of legal or equitable rights.   [PL 1975, c. 573 (NEW).]