Section 1. Amendment of the Constitution may be made in either of the following ways:

(a) By two-thirds vote of the General Council in regular session.

(b) By initiative petition either signed by 20 percent (20%) of the total active membership of the Union, endorsed in writing by 30 percent (30%) of the regular locals, or endorsed by the Board. Said petition shall be forwarded to Headquarters. Within thirty (30) days after receipt at Headquarters and upon verification of the signatures on the petition, the proposed amendment shall be transmitted to the regular locals for approval. The proposed amendment must be approved by a majority of the regular locals within one hundred and twenty (120) days from the date the proposed amendment is transmitted from Headquarters to the regular locals; said amendment shall become effective on the date the last requisite regular locals approval is received in writing at Headquarters.