the nationality, immigration and asylum act 2002 inserted a section 4c into the british nationality act 1981 allowing for registration as a british citizen of any person born between 7 february 1961 and 1 january 1983 who would have become a cukc if the british nationality act 1948 had provided for mothers to transmit citizenship in the same way that fathers could. the borders, citizenship and immigration act 2009 then expanded the earliest date of birth covered from 1961 to 1 january 1949, and elaborated in "a dense and at times impenetrable piece of drafting" on the section's approach, while also covering numerous additional and less common situations, and adding a good character requirement.