; or (2) the expertise of the public health, physical activity, urban planning, land use, and transportation research communities in the United States and abroad. (f) Authorization of appropriations There are authorized to be appropriated such sums as may be necessary to carry out this section. The Secretary may allocate not more than 20 percent of the amount so appropriated for a fiscal year for purposes of conducting research under subsection (c). . 1004. Implementation of recommendations by Environmental Protection Agency (a) Inspector general recommendations The Administrator of the Environmental Protection Agency (referred to in this section as the Administrator ) shall, as promptly as practicable, carry out each of the following recommendations of the Inspector General of the Environmental Protection Agency as described in the report entitled EPA needs to conduct environmental justice reviews of its programs, policies and activities (Report No. 2006–P–00034): (1) The recommendation that the program and regional offices of the Environmental Protection Agency identify which programs, policies, and activities need environmental justice reviews and the Administrator require those offices to establish a plan to complete the necessary reviews. (2) The recommendation that the Administrator ensure that the reviews described in paragraph (1) determine whether the programs, policies, and activities may have a disproportionately high and adverse health or environmental impact on minority and low-income populations. (3) The recommendation that each program and regional office of the Environmental Protection Agency develop specific environmental justice review guidance for conducting environmental justice reviews. (4) The recommendation that the Administrator designate a responsible office to compile results of environmental justice reviews and recommend appropriate actions. (b) GAO recommendations In promulgating regulations of the Environmental Protection Agency, the Administrator shall, as promptly as practicable,