For possible transmission of US citizenship, assuming you were born abroad in 1970/1971 to a US Citizen mother and an alien father, your USC mother would have to have been physically present in the US (or possession) for a minimum of ten (10) years prior to your birth, five (5) of which were after she was 14 years old or older. [INA 301(a)(7) now 301(g)].
Answered on May 04th, 2012 at 2:12 PM