DoD Instruction 1250.22: Employer Support of the Coast Guard and Reserve (EGSR), February 6, 2017 [open pdf - 231KB]
"Purpose: This issuance, in accordance with the authority in DoD Directive 5124.02, establishes policy, assigns responsibilities, and prescribes procedures for:  Staffing ESGR.  Developing programs that promote employer and community support for the operational missions and activities of Reserve Component (RC) members.  Conducting recurring employer relations training of RC members, in accordance with DoD Instruction (DoDI) 1205.12."
DoD Instruction 1250.22; DoDI 1250.22
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/