Fair enough, every one of these laws has a marriage requirement in it, "marriage" being the legal contract of marriage that is currently denied to gay people.
From the GOA: (
http://www.gao.gov/archive/1997/og97016.pdf)
Tables of Laws in the United States Code
Involving Marital Status, by Category
CATEGORY 1—SOCIAL SECURITY AND RELATED PROGRAMS, HOUSING, AND FOOD STAMPS
Title 7—Agriculture
Chapter 5—Food Stamp Program
§ 2012 Definitions
§ 2014 Eligible households
§ 2020 Administration
§ 2030 Washington Family Independence Demonstration Project
§ 2031 Food stamp portion of Minnesota Family Investment Plan
Title 42—The Public Health And Welfare
Chapter 7—Social Security
Subchapter II—Federal Old-Age, Survivors, And Disability Insurance Benefits
§ 402 Old-age and survivors insurance benefit payments
§ 403 Reduction of insurance benefits
§ 404 Overpayments and underpayments
§ 405 Evidence, procedure, and certification for payments
§ 409 "Wages" defined
§ 410 Definitions relating to employment
§ 411 Definitions relating to self-employment
§ 413 Quarter and quarter of coverage
§ 415 Computation of primary insurance amount
§ 416 Additional definitions
§ 422 Rehabilitation services
§ 423 Disability insurance benefit payments
§ 425 Additional rules relating to benefits based on disability
§ 426 Entitlement to hospital insurance benefits
§ 426-1 End stage renal disease program
§ 427 Transitional insured status for purposes of old-age and survivors benefits
§ 428 Benefits at age 72 for certain uninsured individuals