When flying into San Jose del Cabo airport, I've been given a flyer about a new sustainability tax with a link to Travelerfundbcs.gob.mx. According to the LA Times it is voluntary:
Travelers arriving at Los Cabos International Airport will be asked for about $18 (350 pesos) each starting Saturday. But local officials say this isn’t a tax. It’s a request for a voluntary contribution to benefit a new Fund for a Sustainable Baja California Sur.
Under the new program, officials said, the San José del Cabo airport will feature kiosks encouraging visitors to contribute at the kiosk or through online payments.
Isidro Jordán Moyrón, secretary of finance for the State of Baja California Sur, said in a prepared statement that the new effort is not “entry tax” and that “visitors will not be forced or unduly coerced into making a contribution.”
However the official website doesn't mention that it's voluntary:
As such, all international visitors must make a one time payment of $ 350 Mexican Pesos to the Fund.
Is it actually voluntary? Are there any penalties for not paying this tax?