1. For the purpose of collecting such tax and prosecuting suits for taxes under sections 141.010 to 141.160, the collector shall be authorized to employ an attorney whose compensation, in all counties of the first class enforcing the collection of delinquent land taxes under the provisions of sections 141.010 to 141.160 exclusively, shall not be in excess of three hundred dollars per month, as may be fixed by the county commission.

2. The salary paid to said attorney shall be in full of all services rendered the said collector and in lieu of any fees, commissions and charges fixed by law in enforcing the payment and collection of delinquent back taxes on real estate; provided that where counties of the first class are now operating or hereafter may operate under the provisions of the land tax collection law, and amendments thereto, in conjunction with the provisions of sections 141.010 to 141.160, the delinquent land tax attorney shall be compensated for all legal services performed under the provisions of sections 141.010 to 141.160, and the land tax collection law in the amount and manner as provided for in said land tax collection law.