<prompt> Translate the following text to EnglishOMB haijaidhinisha marekebisho hayo na utangulizi wa sheria zilizopendekezwa na za mwisho unasema kwamba marekebisho hayo hayatakuwa na athari mpaka yatakapokubaliwa na OMB.  <response>: OMB has not yet approved the modification and the preambles to the proposed and final rules state that the modification will not be effective until it is approved by OMB. 