(a) Any Contracting State or the Director General may propose a modification under Article 47(2).
(a) When the proposal is made to the Assembly, its text shall be sent by the Director General to all Contracting States at least two months in advance of that session of the Assembly whose agenda includes the proposal.
(a) When voting by correspondence is chosen, the proposal shall be included in a written communication from the Director General to the Contracting States, inviting them to express their vote in writing.
(b) The invitation shall fix the time limit within which the reply containing the vote expressed in writing must reach the International Bureau. That time limit shall not be less than three months from the date of the invitation.
(d) The proposal shall be considered adopted if none of the Contracting States opposes the amendment and if at least one-half of the Contracting States express either approval or indifference or abstention.