TSAILE, Ariz. (AP) – U.S. senators in New Mexico and Arizona have introduced a bill to reauthorize the country’s first tribally controlled college.

Dine College on the Navajo Nation was established in 1968 and now serves about 1,500 students. Its main campus is in Tsaile.

The bill sponsored by New Mexico Sens. Martin Heinrich and Tom Udall, and Arizona Sens. Jeff Flake and John McCain would reauthorize the college through 2020.

The bill also would require the U.S. Department of the Interior to make $2 million a year available to the college for construction grants.