The military primarily uses two articles of the UCMJ to define what military relationships are proper and which are not. Those two articles are Article 92 and Article 134. Article 92 covers “unprofessional” relationships and Article 134 covers fraternization.

What AFI covers professional and unprofessional relationships?

AFI 36-2909 - Professional and Unprofessional Relationships.

Can an NCO marry a junior enlisted Air Force?

Dating & intimate relationships between NCOs and junior enlisted soldiers is prohibited. Marriage will not prevent command action for the fraternization prior to the marriage.