Website: http://www.nsdac.org/nscac/
The objects of this Society are the patriotic and educational: to commemorate deeds of historic interest; to inculcate and foster the love of America and of its institutions by all its residents; to base eligibility to membership upon lineal descent from those men and women who were residents of America when it was under foreign government as colonies and who rendered civil or military service in any American colony prior to 4 July 1776 and to preserve our Colonial heritage.
Membership is open for any child, male or female, of good moral character under the age of 22. An applicant must furnish proof of his/her lineal descendant through legal and lawful marriages, not plolygamous, for an ancestor who rendered at least one of the 26 categories of civil or military service (shown below) to any of the colonies prior to July 4, 1776.
Source(s): http://www.nsdac.org/nscac/membership-3/