The parties may include in the part-time employment agreement, according to article 6 of Legislative Decree 81/2015, flexible clauses related to (i) the change in the scheduled arrangement of the service or (ii) the increase in its duration. The worker is entitled to two business-day notice, unless otherwise agreed by the parties. If the flexible clauses are not included in collective agreements, they may be agreed by the parties before the certification committees. The changes in working time entitle the worker’s right to a 15% increase in the total actual wage, including the effect of the remuneration on indirect and deferred retributive institutions.