this is a tough one!
i know certain areas all have laws as to when a pup must be vaccinated. with that said, the law here is 12 or 16 weeks (i forget which) and my vet is fine with holding off on bree's rabies until i feel comfortable. she is a little over 2lbs at almost 7 months old.
i know i am technically breaking the law but i personally have a problem with the whole annual / every three years rabies law but that is JMO
i do not take her out in public parks or anything like that and there is no threat of her giving rabies to anyone or getting rabies from any of her older siblings since they are all vaccinated.