Governor Sonko issued the instruction amid a back and forth on what motorists should pay.
“I’m calling on all Nairobi motorists to pay the daily parking fees through our systems and avoid middlemen who deny the county government the much needed revenue,” he said.
Despite the law, parking attendants and the electronic payment service platform, ejijiPAY, were still charging motorists Sh300.
Following complaints, Budget and Appropriations Committee Robert Mbatia said the matter would be addressed.
In November last year, Mr Sonko noted the need to ease the burden on motorists, a decision he said was reached by stakeholders including the ward reps.
He said, however, that his administration will review the fees in future after the completion of projects to reduce congestion in the central business district.
The Sh300 charge was an increase from Sh140 in 2013 by former Governor Evans Kidero’s administration.
The county chief also approved the abolishment of the Sh50 fee that estate traders pay the county.
“I’m happy that mama mbogas in city estates will now do business without paying any levy. Traders in county markets will continue to pay. I hope this will help ease burden on our small scale traders," Mr Sonko said.