The return of police patrolling the city's CBD has caused confusion among residents.
Transit passengers can visit the city thanks to new electronic travel authorisation (ETA).
The new taxes affect sugar, ceramics, and alcohol, among other products.
Parents and teachers have raised concerns as learners stare at going through the first term without the books.
This follows backlash from a section of Kenyans.
The government agency also announced consequences for non-compliance.
KUSA has urged all university students across the country to come out in their numbers.
Omtatah claims he has been barred from state offices.
The clarification comes a day after detectives arrested a politician allegedly linked to an organ-harvesting syndicate.