My 6 mo old breastfed son has an allergy to cow's milk protein, controlled by my diet. When can/should I reintroduce dairy?

Milk protein allergy. Babies with above said allergy- tend to tolerate soy better than regular dairy. However, aap guidelines suggest trial if regular milk at one year of age. If not tolerated, try soy milk and products. Re- try regular milk at 18 months and then at two yrs.