Municipalities initiating annexations under the provisions of this Part are authorized to make expenditures for surveys required to describe the property under consideration or for any other purpose necessary to plan for the study and/or annexation of unincorporated territory adjacent to the municipality. In addition, following final passage of the annexation ordinance, the annexing municipality shall have authority to proceed with expenditures for construction of water and sewer lines and other capital facilities and for any other purpose calculated to bring services into the annexed area in a more effective and expeditious manner prior to the effective date of annexation. (1959, c. 1009, s. 8; 1973, c. 426, s. 74; 2011-396, s. 6.)