Floodwaters or extended periods of heavy rain may damage underground storage tanks or cause the discharge of products to the surface.
The government has tightened measures since the Embakasi East explosion in February, which left at least seven people dead.
Before the deal was reached, Uganda had been seeking other ways of importing petroleum products, including through a Tanzanian port, after its oil retailers for decades received their cargo through affiliated firms in Kenya.
EPRA on Sunday, reduced petrol prices by Sh7.21, diesel by Sh5.09 and Kerosene by Sh4.49.
Kenya agreed to purchase power at 6.5 US cents per kilowatt for the first five years before the two countries review the deal.
Kerosene and diesel registered the biggest price drops, at Sh18.68 and Sh10, respectively.
The PS called on players in the sector to regulate themselves even as the government moves in to enhance enforcement measures following the recent tragedy in Mradi area of Embakasi that claimed scores of lives.
The changes which are effective at midnight are for the month of February.