I'm not seeing anyone claim you have that right. But I also don't have any obligation to answer my phone. And there is no expectation (PWA or otherwise) that I will refrain from imbibing within 12 hours of the start of any period for which I have a green slip active. However, a well designed app might even give me the option to enter alcohol consumption start and stop times (or temporarily enter a responsible-for-kids status), so as to automatically adjust green slips I have already entered. The existing interface makes those "temporarily unavailable" status changes impractical.

It is simply non-sensical to continue using a manual-phone-calls-separated-by-10-minutes these days. I understand that is the legacy, but let's move on. I want this company to maximize profits; failing to embrace proven technology for silly reasons (see the surface tablet business decision as an example) robs us of profits and QOL bump-ups. This change would seem to improve things without costing significant jobs...win/win!