Running a TLC-licensed business without the license (likely City law)
"528A" most likely means NYC Administrative Code §19-528(a): it is unlawful to run any business that needs a TLC license, such as a car-service base, without that license. The TLC can fine per day and order the premises closed or sealed. Respondents were almost all car and limousine services, and dates run 1992–1997, which fits this reading. A pre-1992 TLC code can't be fully ruled out.
NYC Admin. Code §19-528(a) (most likely)NYC Administrative Code Title 19, Chapter 5 (readable mirror; official text: American Legal Publishing)