The order, attached to a GOP-sponsored appropriations bill as a rider, counters a cost-cutting plan presented to Congress last month by Postmaster General Patrick Donahoe, the Hill reports.

Mr. Donahoe’s plan would stop all Saturday delivery of first-class mail as a means of saving $2 billion a year. Package delivery would still go forth, however.

“I’m imploring Congress,” he said to Senate Homeland Security Committee members. “Please do not force us back into a six-day [delivery] window. Let us make the move [to five-day delivery] in August.”