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For example , they encourage prompt ELV disposal by continuing vehicle registration fees until transfer of responsibility by sale or issue of “ certificate-of-destruction . Cardioversion of atrial fibrillation / flutter is generally not recommended for asymptomatic or minimally symptomatic arrhythmias until correction of the underlying problems has occurred , which frequently leads to a return to normal sinus rhythm . n.expr tells how many expressions were found ( it will not be greater than the input n.expr , except when the input was -1 , which means to look for expressions until end of string or error ) . The Spanish and Portuguese , who had recently become active in the region , also played a part in these wars until resentment of their power led to the massacre of the Spanish garrison at Phnom Penh in 1599 . Mr. McManamon stated that the regulations direct museums and Federal agencies to retain culturally unidentifiable human remains until promulgation of further regulations , or unless legally required to or recommended to by the Secretary .