D.C. Code § 5-203: Equipment; extra compensation.

The members of the United States Park Police force shall be furnished with uniforms, means of transportation, and such other equipment as may be necessary for the proper performance of their duties, including badges, revolvers, and ammunition; the United States Army officer detailed as Superintendent of the United States Park Police, who shall use on official business motor transportation furnished and maintained by himself, shall receive an extra compensation of not to exceed $480 per annum. Members detailed to motorcycle service shall each receive an extra compensation of $120 per annum.