This DIAA handbook sets forth the rules and regulations governing the administration of interscholastic athletics in the state of Delaware. It includes specific references to the participation of homeless students with the aim of eliminating potential barriers to participation that may be created by mobility due to homelessness.
Download the policy.
(References to homeless students are found on pages 28, 30, 57, and 60)

This state law reads: "A child placed in foster care by an agency of the state or by a political subdivision shall be permitted to attend the public schools in the district in which the foster parents reside free of any charge to the foster parents or the agency. A durational residence requirement may not be used to prohibit that child from fully participating in any activity sponsored by the school district." The durational residence requirement portion will enable foster students to participate fully in all school activities regardless of how long they've lived in their current foster placement.
View the code online (scroll down to (f)).

VHSL's Handbook clarifies that students experiencing homelessness are eligible to participate in extracurricular activities just as any other student would be.
Download the handbook.
(See (15) on page 66)