; and (3) by striking subsections (c) and (d) and inserting the following: (c) Effective date (1) Armed forces With respect to an individual described in subsection (a)(1), this section shall take effect at each public institution of higher education in a State that receives assistance under this Act for the first period of enrollment at such institution that begins after July 1, 2009. (2) Homeless youth and foster care youth With respect to an individual described in subsection (a)(2), this section shall take effect at each public institution of higher education in a State that receives assistance under this Act for the first period of enrollment at such institution that begins during the first full award year following the date of enactment of the Higher Education Access and Success for Homeless and Foster Youth Act . (d) Definitions In this section: (1) Armed forces The terms armed forces and active duty for a period of more than 30 days have the meanings given those terms in section 101 of title 10, United States Code. (2) Homeless youth The term homeless youth has the meaning given the term homeless children and youths in section 725 of the McKinney-Vento Homeless Assistance Act ( 42 U.S.C. 11434a ). . 18. Secretarial support and guidance for homeless youth and foster care youth Part B of title I ( 20 U.S.C. 1011 et seq.) is amended by adding at the end the following: 124. Secretarial support and guidance for homeless youth and foster care youth (a) Guidance Not later than 120 days after the date of enactment of the Higher Education Access and Success for Homeless and Foster Youth Act , the Secretary shall issue revised guidance for institutions and financial aid administrators regarding serving unaccompanied homeless individuals described in section 725 of the McKinney-Vento Homeless Assistance Act and individuals who are former foster care youth. (b) Professional development Beginning not later than 1 year after the date of enactment of the Higher Education Access and Success for Homeless and Foster Youth