It was supposed to be "at the beginning of April", but PornHub is still accessible to me in its entirety. Looks like it's been pushed back again.
According to Google
this was written up 4th of April 2019 that seems to indicate that it keeps getting pushed back because nobody's talking to each other and there's privacy concerns over such a scheme. It also keeps adding fuel to the "OI MATE YOU GOT A LOICENSE FO' DAT [name of thing here]" memes we've become associated with.
The website makes some good points about how barely anyone knows about this bill, how it was passed with very little fanfare, and
how nobody is fucking talking about it. The fact that it's been passed quietly so as to avoid the backlash and trying to impose an anti-porn block nobody asked for under the pretense that it's "protecting children" is pretty worrying. I don't see what they perceive to be so damaging about porn that it warrants policing the entire populace over whether they're 18, when the legal age to have sex is 16. Teenagers are horny buggers and are going to be curious about sex long before they're 18, and I'd rather my kid whack off to porn than be sexually surpressed by a government that's out of touch with its people. There are bigger things to worry about than the Golden Shower GILF porn Little Timmy likes to watch, and parental blocks are a thing. So using the protection of children as a justification for pushing this agenda is utter horseshit, and is not good enough.