Closing off of 21 acres of Curragh Plains

My first question at this months (17th Oct) Municipal District meeting;

On what grounds is a local constituent permitted to cause the closing off of 21 acres of Curragh Plains (adjacent to Racing Academy and Centre of Education R.A.C.E. grounds) from members of the public?
Here is the report Issued by: Mr J Hannigan, Staff Officer, Members Services: The Curragh is vested in the Minister for Defence. This question should be addressed to that Department.