The shade tree commissioners shall serve without compensation, but with the consent of the board of chosen freeholders, shall be entitled to be reimbursed for their necessary expenses, and, with the consent of the board, may employ such expert, clerical or other assistance as they deem necessary and proper, and may fix their compensation, which shall be paid as is the compensation of other employees of the county.
With the consent of the board the commissioners may buy, sell or exchange such trees, plants, equipment or supplies as they deem necessary and proper for the work of the commission, and make payment therefor in the manner in which such expenditures are ordinarily made by the county.
N.J.S. § 40:37-4