AN ACT PRESCRIBING WORK ARRANGEMENTS BASED ON SECURITY OF TENURE, AMENDING FOR THIS PURPOSE, ARTICLES 156, 157, 158, 159, 160, 161, 162, 163, 164 AND 165 OF PRESIDENTIAL DECREE NUMBER FOUR HUNDRED FORTY TWO (P.D. NO. 442), AS AMENDED, OTHERWISE KNOWN AS THE LABOR CODE OF THE PHILIPPINES