3. (1) All essential personnel over the age of 18 and under the age of 60 years, residing in Bangladesh, and not being employees of the ¹[* * *] Government, shall be liable to register themselves at a District Employment and Manpower Office. (2) Every person in charge of any institution which trains such essential personnel as aforesaid, or from where such personnel qualify, shall furnish to the ²[Assistant Director] of the District Employment and Manpower Office concerned such information as he may from time to time require. (3) All employers other than the ³[Government] shall be liable to get all persons to whom this Ordinance applies and who are employed by them registered at a District Employment and Manpower Office, if such persons are not already so registered. (4) Every person registered under this Ordinance shall notify any change of address, acquisition of new skills and change in employment status, at once to the District Employment and Manpower Office where he is registered.