§ 177-c. Powers and duties of the director of purchasing. In any fire district in which the office of director of purchasing has been established and a director of purchasing shall have been appointed and qualified, the director of purchasing shall make all purchases and all contracts for supplies, materials and equipment of every nature for the fire district within budgetary appropriations provided therefor. Before making any purchase, the director of purchasing shall comply with such rules and regulations in relation thereto as may be established by resolution of the fire commissioners and such provisions of law as may be applicable thereto, including Article 5-A of the general municipal law.