(A) The city may continue the retirement plan and the payments of the contributions hereunder indefinitely, but the same is not assumed as a contractual obligation of the city and the right is reserved by the city by action of the City Council at any time to discontinue the plan and its contributions hereunder. The contributions under the plan for employees of each department of the city shall be paid only from funds appropriated for, or otherwise duly available from the payment of such expenses of such department.
(B) Nothing in the pension plan, nor any amendments thereto, shall be construed so as to permit any part of the contributions to the plan, or the principal or income of the plan, to be used for or diverted to any purpose other than for the exclusive benefit of members hereunder or their beneficiaries.