Why are states in Nigeria not paid their share of the oil and gas earnings in the currency it was earned in, i.e., the United States Dollars (USD)?

Crude oil in Nigeria is owned by the Federation — the Federal, State, & Local Govt. Shared as follows: 13% is deducted & paid to the oil and gas producing States; next, the Federal Government (FGN) gets 52.68%; the States get 26.72%, & the Local Governments get 20.60%.

When Nigerian crude oil is sold, the proceeds are in USD and get paid to the NNPC/CBN/JPMorgan Account in the US. The Oil taxes, e.g., Petroleum Profit taxes, are also in USD and are collected by the Federal Inland Revenue Service and paid to the Central Bank of Nigeria (CBN

The same thing applies to the royalty bonus collected by the Department of Petroleum Resources (DPR) and paid to the CBN. The CBN then converts the USD sales proceeds to Naira.

The CBN and Ministry of Finance then fund Federal agencies like NEMA and the Consolidated Revenue Fund in Naira, even the 13% derivation is paid in Naira. In other words, while the CBN retains the USD, the Federal, States, and LGAs get Naira