Is this what you are referring to?
It is obvious that the primary commanding of the seven Noahide mitzvot was to Adam and Noah, but God added three new dimensions through Moses:
(a) The Torah's details of the Noahide commandments that were not revealed before Mount Sinai.
(b) Their new strength as absolute and eternal commandments, which did not exist before Mount Sinai.
(c) After Mount Sinai, it is impossible to add, subtract or change any of the Noahide Commandments forever.