Under Section 5(3), a member may resign his office by giving notice in writing to the Central Government, and such member shall be deemed to have vacated office:

Section 5(3) requires a resigning member to give written notice (for such period as may be prescribed under Section 41(2)(c)) to the Central Government, but the resignation does not take legal effect merely upon signing or upon expiry of a fixed thirty-day period - it becomes effective, and the member is deemed to have vacated office, only when the resignation is NOTIFIED IN THE OFFICIAL GAZETTE by the Government. There is no requirement of a successor being appointed first, nor is Board-level acceptance through resolution necessary; the Gazette notification by the Central Government is the sole triggering formality, making the precise vacation-of-office moment a Government-controlled administrative act rather than a self-executing resignation.