You can give eggs as soon as your son is ready for their consistency. No need to wait on the egg white - conventional wisdom used to say to wait on them until a year, but the AAP recently changed their recommendation and said that even the usual "allergenic" foods were okay to give children under a year and that holding off on them showed no reduction in the number of allergies to the various foods.
Personally, my son had them at about 8 or 9 months old. He loved scrambled eggs and hard boiled eggwhites. We have no food allergies in my family so the doctor was ok with it. Talk to your child's doctor and see what they say and as always watch for signs of allergies.
I think they can have the yolks around 9 months maybe even younger, but shouldn't have the egg whites till after 1 yr. I personally started giving my son scrambled eggs around 10months, we've never had any food allergies though and he did fine with them.