Is it normal or legal when an private sector...

We would like to inform you that regarding to the termination of the work contract, it is considered the employer's behavior to be a legal act if he provided a notice 3 months before, but regarding work on the day of the leave, this is due for him to overtime
Article 44
In the event where the term of the work contract is not specified, both parties shall have the right to terminate the same by means of a notice to the other party as follows:
a- Three months prior to the termination of the contract for the workers earning a monthly remuneration.
b- One month prior to the termination of the contract for other workers. In the event where the party wishing to terminate the contract does not abide by the period of notice, he shall be obliged to pay the other party a compensation for the notification period
equal to the remuneration of the worker for the same period.
c- In the event where the notification of termination is issued by the employer, the worker shall have the right to be absent one day or 8 hours per week in order to search for other work. He
shall also be entitled to his remuneration for the day or hours of absence. The worker shall decide on the day or hours of absence and shall notify the employer at least one day prior to such absence.
d- The employer may exempt the employee from work during the period of notification while but shall count such period within the worker's period of service. The employer shall pay the worker all his entitlements and remuneration for the period of notification.