While the Army, Navy, Air Force, and Marines all fall under the financial purview of the Department of Defense and will not see an interruption of their pay if the partial government shutdown continues beyond Friday, the U.S. Coast Guard falls under the Department of Homeland Security. As a result, 42,000 Coast Guard members tasked with securing the nation’s coastline will be forced to work without pay until the government is up and running again.

“Unless legislation is passed by Friday, Dec. 28, our military workforce will not receive our regularly scheduled pay check for 31 Dec.,” Chief Warrant Officer Allyson Conroy said in a pre-prepared statement on Wednesday.

That 42,000 figure represents about 90% of the Coast Guard workforce, all of whom would be expected to continue their daily duties despite missing their upcoming pay check. The remainder of the force would be furloughed without pay. According to planning documents and past precedent, border security and coastal rescue operations would continue uninterrupted throughout the shutdown — the men and women tasked with continuing these operations would just do so without pay.

Most of the Coast Guard’s civilian work force have already been furloughed without pay, with only a few that are considered “essential” remaining on staff despite the pay freeze.