Section 4. Mandate of Educational Institutions to Disadvantaged Students. - All public and private educational institutions covered by this Act are hereby mandated to accommodate and allow Disadvantaged Student unable to pay tuition and other fees to take the scheduled periodic and final examinations without requiring a permit: Provided, however, That in the case of K to 12 students, the mandate shall be for the entire school year: Provided, That the Municipal, City or Provincial Social Welfare and Development Officer, or the Regional Office of the Department of Social Welfare and Development (DSWD), as the case may be, shall issue the necessary certificate on the disadvantaged status of the student due to calamities, emergencies, force majeure and other food or justifiable reasons in accordance with the rules and regulations to be issued by the DSWD: Provided, further, That this Act shall be without prejudice to the right and power of educational institutions to require the submission of a promissory note, withhold records and credentials of students and such other legal and administrative remedies available to them for the collection of unpaid fees: Provided, finally, That educational institutions may voluntarily, without need of the certification mentioned herein, allow a Disadvantaged student with outstanding tuition and other fees to take examinations and release their relevant records and credentials in accordance with its policies, rules and regulations.