(a) Any agency is authorized to deduct from the salaries or wages of its employees amounts designated by the employee for the purpose of contribution to charitable organizations. No such deduction procedure shall be implemented without the approval of the chief executive officer or governing board of the agency.

(b) No deduction shall be made without the written request of the employee, which request shall designate the amount which is to be deducted. Deductions shall be made monthly or to coincide with each pay period as determined by the agency. No deduction shall be made for less than $1.00 per deduction period or for less than $1.00 per designated charitable organization. Employees shall be clearly apprised, on solicitation materials, of the manner in which funds will be distributed. All deduction authorizations shall remain continuously in effect until changed or canceled in writing by the employee. No deduction shall be made for the benefit of any organization which fails to secure approval of the board.