Maryland Statutes
Part I - Membership Generally
Section 22-207 - Membership in the Teachers' Retirement System -- Discretionary

The Board of Trustees may deny membership in the Teachers’ Retirement System to, or make membership optional for, any class of individuals described in § 22-205(a) of this subtitle whose:
        (1)    compensation is paid only partly by the State; or
        (2)    employment is temporary or on other than a yearly basis.