The bills were the ones that had earlier been passed by the National Assembly and sent to the President for assent.
The Senior Special Assistant to the President on National Matters (Senate), Ita Enang, disclosed this to State House correspondents shortly after the President signed the bills into law at the Presidential Villa, Abuja. Enang said the bills signed into law cut across various sectors of the economy and development.

He listed the new laws as the Prevention of Crime Amendment Act 2016; National Crop Varieties and Livestock Breeds (Registration) Amendment Act 2016; Telecommunications and Postal Offences Amendment Act 2016; National Agricultural Land Development Authority Amendment Act 2016; Produce Enforcement of Export Standards Amendment Act 2016; Agricultural and Rural Management Training Institute Amendment Act 2016; Bee Import Control and Management Amendment Act 2016; and the Water Resources Amendment Act 2016.

Enang said, “These bills were passed by the National Assembly and transmitted to Mr. President for assent and Mr. President today (Friday) assented to them today and (they) have automatically become law.

“Mr. President expresses his appreciation to the leadership and the membership of the National Assembly for the great work they did in considering the bills.”

Source: http://nigerianewstoday.com.ng/buhari-signs-eight-bills-into-law/