According to TheScoopNG:
January 14, 2014 President Jonathan has signed the Same S3_x Prohibition Act into law, drawing mixed reactions from most Nigerians. The Scoop’s Abigail Anaba took this photo in a hotel in Abeokuta, the Ogun capital. And that was even before Jonathan signed the law. So if the police was already so serious about implementing this law even before it was signed, expect to see more of such signs.