in hospitals operated by the Indian Health Service housing allowances equivalent to those that would be provided to members of the Commissioned Corps of the United States Public Health Service serving in similar positions at such hospitals: Provided further , That the appropriation structure for the Indian Health Service may not be altered without advance notification to the House and Senate Committees on Appropriations. National institutes of health National institute of environmental health sciences For necessary expenses for the National Institute of Environmental Health Sciences in carrying out activities set forth in section 311(a) of the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (42 U.S.C. 9660(a)) and section 126(g) of the Superfund Amendments and Reauthorization Act of 1986, $78,349,000. Agency for Toxic Substances and Disease Registry Toxic substances and environmental public health For necessary expenses for the Agency for Toxic Substances and Disease Registry (ATSDR) in carrying out activities set forth in sections 104(i) and 111(c)(4) of the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) and section 3019 of the Solid Waste Disposal Act, $74,691,000: Provided , That notwithstanding any other provision of law, in lieu of performing a health assessment under section 104(i)(6) of CERCLA, the Administrator of ATSDR may conduct other appropriate health studies, evaluations, or activities, including, without limitation, biomedical testing, clinical evaluations, medical monitoring, and referral to accredited healthcare providers: Provided further , That in performing any such health assessment or health study, evaluation, or activity, the Administrator of ATSDR shall not be bound by the deadlines in section 104(i)(6)(A) of CERCLA: Provided further , That none of the funds appropriated under this heading shall be available for ATSDR to issue in excess of 40 toxicological profiles pursuant to section 104(i) of CERCLA during fiscal year