He was the Attorney General of Ghana between April 1969 to February 1971 in the National Liberation Council administration and Busia government.
In a matter of three years Adade had a renowned and reputable law chamber in Kumasi, putting him in professional competition nationwide.
As a member of the Bench, particularly in his tenure as Justice of the Supreme Court, he led the majority on the Court, in the celebrated case of the NPP v Attorney General, to outlaw the official celebration of the 31 December coup as being offensive to the letter and spirit of the democratic Constitution of the Fourth Republic of Ghana.
NYB Adade's authoritative opinion in the case remains a landmark in the annals of constitutional interpretation of Ghana.
He was later appointed as Minister of the Interior from 1971 until 1972 when the Busia government was overthrown by the SMC chaired by General I. K. Acheampong.
During the SMC era he joined the famous organisation set up by Akwasi Afrifa to oppose General I. K. Acheampong’s UNIGOV idea – the Peoples’ Movement for Freedom and Justice (PMFJ), whose General Secretary was Nana Akufo-Addo; now president of the republic of Ghana.
[11] Nana Akufo-Addo, who was then leader of the main opposition party in Ghana, paid tribute to Adade's service to Ghana saying: "He belongs to a noble generation of men and women who suffered the deprivations of detention and exile to ensure that our nation was set on the path of democratic governance under the rule of law.