A county or municipality may:

1. (1) use funds which are allocated to class B and class C roads for matching federal funds for the construction of secondary roads now available or which may later become available in accordance with the provisions of law; and
2. (2) use up to 30% of the class B and class C road funds allocated to the county or municipality to pay the costs of asserting, defending, or litigating local government rights under R.S. 2477 on class B, class C, or class D roads.