Beginning in the year 2012 and each year thereafter each employee shall receive a clothing allowance of one thousand two hundred dollars ($1,200) annually for the purchase of regulation uniforms and clothing as prescribed by the Chief of Police to be paid in the month of January of each year. In addition to the annual clothing allowance, there shall be a one-time payment to any bargaining unit member after permanent assignment to an investigative position, or promotion from Sergeant to Lieutenant, of two-hundred fifty dollars ($250.00).