If a country indicates a subsequent date in its instrument of accession, this Act shall enter into force with respect to that country on the date thus indicated.
如果该国在其加人书中指定了以后的日期,本议定书应在其指定的日期对该国发生效力。
This resulted in passage of the Clean Air Act of 1970 and subsequent amendments in 1977 and 1990.