§ 213. Uniform allowance for officers. To assist in uniforming and equipping themselves, officers who have been on active duty or active service as such and who have performed eighty percentum of all ordered duty during a calendar year of twelve months shall receive annually fifty dollars. Officers who have been on active duty or active service as such during a period of less than a calendar year and who have performed eighty percentum of all ordered duty during such period of service shall receive such proportion of the uniform allowance for the year as the period of duty or service performed by them bears to a calendar year of twelve months. The allowance herein prescribed shall not be granted to any officer in respect to any period for which he shall have received pay or pay and allowances or uniform allowance from federal funds.