What you have reported is absolutely right.  HPD pretty much does what they want and they pick and chose what  laws they see fit  to
enforce including traffic violations .  When the  moped bill came up at the 2016 legislative session, HPD was not in
support of the law and neither was the City's Dept of Customer Service which is responsible for motor vehicle/moped/motorcycle registrations and safety checks.  I suspect that both HPD and the City have been dragging their feet on enforcing the moped law.
The state legislator needs to check on whether the law is being enforced and if not, why not.  If HPD is not enforcing the law,
the legislator needs to find ways to cut their requests for funding and take them to Court.
It seems that this is the only thing HPD brass understand. Their arrogance before both the state legislature and the
City Council is amazing and this was not the case when Frank Fasi was Mayor.