According to the document,
The structures of governance should not be confused with the party structures. The permanent temptation of reproducing the model of the party of the state should be rejected institutionally.Yes, it is a hell lot easier to discover that one's party should be autonomous of the government - and not merely reproducing the vices of the PRI, where the party and the state were most often inseparable - just as you are about to leave.
It would ring a lot less hollow if the PAN - which copied so many of PRI's nefarious practices and in the end almost fully corrupted its once-vaunted party organization - would have attempted any such move during any one of the twelve years it actually held national power.
Source:
Panistas se imponen código de ética. El Universal, Oct. 7, 2012