; and (v) open textbooks that conform to accessibility standards under section 508 of the Rehabilitation Act of 1973 ( 29 U.S.C. 794d ). (4) Use of funds (A) Mandatory uses of funds An eligible entity that receives a grant under this section shall use the grant funds to carry out the following activities to expand the use of open textbooks: (i) Professional development for any faculty and staff members at institutions of higher education, including the search for and review of open textbooks. (ii) Creation or adaptation of high-quality open educational resources that conform to accessibility standards under section 508 of the Rehabilitation Act of 1973 ( 29 U.S.C. 794d ), especially open textbooks, and the quality assurance of such open educational resources. (iii) Development or improvement of tools and informational resources that support the use of open textbooks, including improving accessible instructional materials for students with disabilities that conform to accessibility standards under section 508 of the Rehabilitation Act of 1973 ( 29 U.S.C. 794d ). (iv) Research evaluating the efficacy of the use of open textbooks for achieving savings for students and the impact on instruction and student learning outcomes. (B) Discretionary use of funds An eligible entity that receives a grant under this section may use grant funds to purchase or maintain electronic equipment necessary for the operation or use of digital open educational resources, including mobile computer devices and accompanying hardware, software applications, computer systems and platforms, and other digital and online services and support. (5) Open licensing requirement (A) Copyright An eligible entity receiving a grant under this section may, with prior approval from the Secretary, assert a copyright in a copyrightable work first produced under the grant. (B) Open license requirement (i) Requirement With respect to each copyrightable work first produced under the grant, except as provided in clause (ii), an eligible entity that asserts a