According to The Nation, the two officials submitted their declarations to the Code of Conduct Bureau 24 hours before the inauguration ceremony held on May 29.
Mallam Garba Shehu, Buhari's media aide, confirmed the development saying that the Bureau acknowledged the forms receipt.
"The Nigerian Constitution states in Chapter VI Section 140, that a person elected to the office of President shall not begin to perform the functions of that office until he has declared his assets and liabilities as prescribed in the Constitution.
"While seeking election into the highest office in the land, the president had promised Nigerians that he would publicly declare his assets as soon as he took over government."
The content of the declarations was not provided, however.