Puerto Rico Governor Alejandro Garcia Padilla

Puerto Ricoโ€™s potential bond default could be an ownerโ€™s manual for overburdened U.S. states.

Two days before a potential historical default, Puerto Rico Governor Alejandro Garcia Padilla made it clear that the commonwealth wonโ€™t pay bondholders even as Congress votes on a bill allowing the island to restructure its $70 billion in debt.

โ€œOn July 1, 2016, Puerto Rico will default on more than $1 billion in general obligation bonds, the islandโ€™s senior credits protected by a constitutional lien on revenues,โ€ Garcia Padilla wrote in a editorial posted on a CNBC website.

The lapse will mark the first time the U.S. territory has failed to pay what it owes on general-obligation debt, a $13 billion swath that its constitution says has the top claim to the governmentโ€™s funds. Garcia Padilla previously said the commonwealth couldnโ€™t raise enough to cover whatโ€™s owed to bondholders even if he shut down the government. The island has about $2 billion in principal and interest payments due Friday.

Related: Senate passes Puerto Rico financial rescue bill