Is there a cut-off point at which an employer's specific responsibility for the protection of a breastfeeding employee ends?

No, the employer's obligation under the Workplace (Health, Safety and Welfare) Regulations 1992 (SI 1992/3004) to provide suitable facilities for breastfeeding mothers to rest, continues as long as the employee chooses to breastfeed.

Similarly, the employer has an ongoing duty to assess and address risks to breastfeeding mothers and their infants where they may be affected by hazards that arise from processes, working conditions, or physical, biological or chemical agents. This duty applies for as long as the mother chooses to breastfeed.