What are you even thinking of? Are you referring to when infants are brought to a worksite?
I cannot imagine that an employer needs a breastfeeding policy:
1) Employees are permitted to breastfeed their infant only for the first 6 weeks from the infant's birth?
2) Employees are required to breastfeed their infant for the first 30 days from the infant's birth, and may continue to breastfeed for up to an additional 30 days?
3) No breastfeeding is permitted at the company facility during business hours?
It smacks of gender discrimination because it would apply to female employees and not to males. I cannot imagine that the use of a woman's breasts are her employer's business.
How about the type of policy described in
Breastfeeding Policy?