Rule 31
Method Of Withholding By Employer
Any employer shall, in  withholding tax from employment pursuant to Sub-section (1) of Section 87 of the Act, carry out as follows:-
(a) If an adjustment of tax for medical treatment is allowed pursuant to Section 51 of the Act, adjust such amount, and
(b) Withhold tax on a monthly basis on pro rata of the tax payable on the annual remuneration of the employee or worker.