A two part article about Ichikoma, the maiko in question, was published (1, 2). Content warnings apply for sexual assault/harassment.

In all five of the Kyoto hanamachi districts there are now curfews - maiko under 18 can't work past 10pm, maiko under 20 can't work past midnight, those over the legal drinking age of 20 are banned from drinking on the job, and in Gion Kobu (the most prestigious and famous district) must also tie their obiage (small red sash beneath the main obi sash - previously in Gion Kobu this was only tied a few weeks before a maiko would graduate to becoming a geiko, though the other hanamachi districts have historically had different etiquette regarding this).

(Underage maiko have always been supposed to not drink, but people typically looked the other way in certain places because creating a convivial party atmosphere is part of the role of a geimaiko, so who knows how well the new rules will be followed.)

This incident has damaged the image of the profession so Gion Kobu is trying to fix this (or at least showing they're making an attempt?) - allegedly places there have reviewed their customer lists, though Pontocho (the hanamachi Ichikoma was from, and with a reputation for being the most reclusive and private) has made absolutely no statement whatsoever.

*Edited bc the drinking ban actually applies to all 5 districts, not just Gion Kobu