Changes to 1999/304/EC: Commission Decision of 12 April 1999 on a common technical regulation for integrated services digital network (ISDN); telephony 3,1 kHz teleservice, attachment requirements for handset terminals (edition 2) (notified under document number C(1999) 875)
EU Decision 1999/304
No changes to 1999/304/EC: Commission Decision of 12 April 1999 on a common technical regulation for integrated services digital network (ISDN); telephony 3,1 kHz teleservice, attachment requirements for handset terminals (edition 2) (notified under document number C(1999) 875) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.