Retrenchment notice requirements govern timing, form, and service to authorities before termination of long-serving workers. Service of prior notice is required before retrenchment of a worker with continuous service of not less than one year. The employer must send notice of retrenchment in Form-XIII to the Central Government and the concerned Deputy Chief Labour Commissioner (Central) by e-mail or speed post. The notice must be sent within three days after notice is served on the worker, or within three days after wages in lieu of notice are paid, or at least one month before the agreed termination date, subject to a three-day period where that date falls within thirty days of the agreement.