I looked up acronyms for PU, the only one I could find relating to smell would be pig urine. But all of the other info about it I found said that it doesn't actually stand for specific words starting with the letters P and U. Here is the best answer I found from the website- The Phrase Finder:
National Transport Authority > Taxi and Bus Licensing > Taxi > SPSV Driver Licensing > Renew an SPSV Driver Licence. A regular SPSV driver licence is valid for five years and is renewable; a local area hackney driver licence is valid for three years and cannot be renewed. (The holder of a local area hackney driver licence who wishes to continue operating can, however, apply for a new licence.) To renew your SPSV driver licence, you must hold: 1  A valid full Irish driving licence or equivalent; 2  A valid SPSV driver licence; 3  Must be Tax Cleared with Revenue.
8 Year Expirations Top â. The DMV is transitioning to 8-year expirations for most standard driver licenses, commercial licenses and identification cards. Higher fees apply to 8-year licenses. Most original licenses and renewals for those who were born in an even-numbered year will be valid for 8 years. You must renew in-person at a DMV office. You may wish to obtain a Real ID compliant license at the same time. Renewals for those born in odd-numbered years will be valid for 4 years at the next renewal in 2014-2017, then 8 years at the renewal in 2018 and beyond.