when the vice president officiates as president he draws the salary of

When the Vice President officiates as President, he draws the salary of the President. This means during the period he acts as President, he receives the President's salary rather than his usual salary as Vice President or as Chairman of the Rajya Sabha (in contexts like India). The entitlement to the President's salary while officiating as President is established to align remuneration with the responsibilities being performed at the time.