Arlington National Cemetery Integrity Act of 1998

Arlington National Cemetery Integrity Act of 1998 - Allows the remains of the following persons to be interred at Arlington National Cemetery: (1) any member of the armed forces who dies while on active duty; (2) any retired member who served on active duty, was carried on a retired list, and was entitled to retired pay; (3) any former member who was separated for physical disability before October 1, 1949, who served on active duty, and who would have been eligible for disability retirement if such provisions had been in effect on such date; (4) any former member whose last active military service was terminated honorably and who has been awarded one of a number of specified military decorations; (5) any former prisoner of war who while such a prisoner served honorably, whose last active military service terminated honorably, and who died on or after November 30, 1993; (6) any former member whose last active military service terminated honorably and who has held one of a number of specified positions in the Federal Government, the Supreme Court, or the State Department; (7) the President or any former President; (8) the spouse, surviving spouse, minor child, and, in the discretion of the Cemetery's Superintendent, unmarried adult child of an interred member; and (9) the parents of a minor child or unmarried adult child whose remains, based on the parent's eligibility, are already buried in the Cemetery.

Authorizes: (1) burial in another part of the Cemetery in the case of the remains of a spouse who cannot be buried at the gravesite of the related spouse due to the encroachment of tree roots, shrubs, plants, or similar events; and (2) Cemetery burial for the remains of disabled adult unmarried children of individuals eligible for Cemetery burial.

Authorizes the cremated remains of the following persons to be placed in the Cemetery columbarium: (1) a veteran whose last period of active duty ended honorably; and (2) the spouse, surviving spouse, minor child, or unmarried adult child (discretionary) of such a veteran.