The article sort of implies both. > because so many federal workers have been sent home on unpaid leave — or worse, working without pay but trying to fill in f

The article sort of implies both. > because so many federal workers have been sent home on unpaid leave — or worse, working without pay but trying to fill in for most of their furloughed department — expired certificates aren’t getting renewed. Renewing certificates doesn’t take much time or effort — sometimes just a click of a mouse. But some do cost money, and during a government shutdown there isn’t any. My personal guess is that the author of the article doesn't know which it is.