20 CFR § 681.220 - Who is an “in-school youth”?
An ISY is an individual who is:
(a) Attending school (as defined by State law), including secondary and postsecondary school;
(b) Not younger than age 14 or (unless an individual with a disability who is attending school under State law) older than age 21 at time of enrollment. Because age eligibility is based on age at enrollment, participants may continue to receive services beyond the age of 21 once they are enrolled in the program;
(c) A low-income individual; and
(d) One or more of the following:
(2) An English language learner;
(3) An offender;
(4) A homeless individual aged 14 to 21 who meets the criteria defined in sec. 41403(6) of the Violence Against Women Act of 1994 (42 U.S.C. 14043e-2(6)), a homeless child or youth aged 14 to 21 who meets the criteria defined in sec. 725(2) of the McKinney-Vento Homeless Assistance Act (42 U.S.C. 11434a(2)), or a runaway;
(5) An individual in foster care or who has aged out of the foster care system or who has attained 16 years of age and left foster care for kinship guardianship or adoption, a child eligible for assistance under sec. 477 of the Social Security Act (42 U.S.C. 677), or in an out-of-home placement;
(6) An individual who is pregnant or parenting;
(7) An individual with a disability; or
(8) An individual who requires additional assistance to complete an educational program or to secure or hold employment.