Requirements for candidates
Bulgarian legislation does not set any significant restrictions to the candidate-adoptive parents. They must be above 18 years of age, to be at least 15 years older than the adoptive child and to meet all requirements of the applicable U.S. laws. This is the rule stated in the Family Code but the Intercountry Adoption Council firmly abides by the following age criterion: "There should not be more that 50 years age difference between the adoptee and the younger spouse in a married couple and there should not be more that 55 years age difference between the adoptee and the older spouse in a married couple. When a child is adopted by a single adopter, the lower age difference (of 50 years) should be considered."
US federal laws do not set restrictions with regards the family status: both single prospective adoptive parents and couples can apply.
When the prospective adoptive parent is a single person, he/she must have reached 25 years of age. Upon application by a couple, at least one of them must be a US citizen. No age restrictions apply towards married couples.