(a) After adoption of the budgets by the county councils, the budgets may be amended by resolution by the county councils on their initiative or at the request of the Commission.
(b) Before adopting a budget amendment under this subsection, a county council shall:
(1) receive recommendations from the respective county executive; and
(2) hold a public hearing on reasonable notice to the public.
(c) An amendment to a budget item allocable to both counties is not effective unless it has received the concurrence of both county councils.