Sec. 341.903.  AUTHORITY OF HOME-RULE MUNICIPALITY TO POLICE MUNICIPALLY OWNED PROPERTY OUTSIDE MUNICIPALITY.  A home-rule municipality may police the following areas owned by and located outside the municipality:
(1)  parks and grounds;
(2)  lakes and land contiguous to and used in connection with a lake;  and
(3)  speedways and boulevards.
Acts 1987, 70th Leg., ch. 149, Sec. 1, eff. Sept. 1, 1987.