section 7, to create, maintain, and administer a network of National Resource Centers on Augmentative and Alternative Communication. Each national resource center shall be a comprehensive training, technical assistance, and resource center created to work toward eliminating the continued discrimination against, isolation of, marginalization of, and denial of effective communication for and equal opportunity of, individuals with significant expressive communication disabilities, through activities including the priority activities described in section 6. (b) Awards for multiple centers The Secretary shall award the grants for national resource centers in 3 geographically diverse locations, and shall designate one of the centers as the lead administrative center. (c) Lead Administrative Center The lead administrative center shall coordinate— (1) all activities of the centers