Adhere is just a less common English word for many speakers. Why not the “nine upholds”? Uphold or insist are both better choices than adhere in plain English.

At the end of the day these party slogans are excruciating mind numbing and Orwell would have wonderful time with them. “Politics and the English Language” is an essay of his I use to make all new PhD students read. Not a few ... oops ... many academics could benefit too (just refereed a journal article that was woeful in its language despite really fine analytical content).