Advertising Standards Authority executive director Hillary Souter said the advertisement was posted in a relaxed forum.
"What we can find, particularly with advertising on social media platforms, is that if people have a problem with what it says, they say so on the social media platform."
She said there was nothing the ASA could do unless a complaint was lodged with them.
"The more conditions you list, the more ridiculous it sounds."
A Human Rights Commission spokeswoman said the organisation had not received a complaint about the advertisement.
She said the Human Rights Act generally prohibited discrimination on the basis of sex in relation to employment matters and specifically makes it unlawful to publish or display any advertisement which indicated an intent to commit a breach of the Act.
However, there were some exceptions to the general prohibition on discrimination, including situations where different treatment on the basis of sex is required as a genuine occupational qualification for the position or employment.