Do not be sexually intimate with one’s father’s brother in homosexuality
“The nakedness of your father’s brother you shall not uncover” Vayikra 18:14
This is an additional prohibition to homosexuality (-116)
If one was sexually intimate with one’s fathers brother-
Where there were witnesses and a warning both deserve death by stoning.
If without a warning and done deliberately the punishment is spiritual severance.
If done unwittingly two sin offering are required. (including -116)
This is in effect in all places at all times