I'm not sure what the intention is here, or what there is to be gained by imagining the non-aggression principle as a document that could be 'amended', it's not really comparable to a constitution or other legislative document. Constitutions are legal frameworks that mediate power relations apposite to a particular institution; their legitimacy rests on principles, and they can be amended to in an attempt to better reflect the existing principles it rests on, or to reflect a new set of principles.
I suppose you could use the mediation of institutional power by constitutions as an analogy for the mediation of individual power by moral principles (maybe that's what your question is trying to do?), but it's kind of tenuous given that institutions have to legitimize both the way they exercise power and their very existence (constitutions and 'the rule of law' are an attempt to legitimise both by drawing a box and saying 'everything outside the lines is arbitrary, therefore everything inside is legitimate), where as individuals don't have to justify their own existence.
So to answer the original question, not really. Sure individuals could potentially twist the meaning of the non-aggression principle to justify their behavior towards others, but it's formulation is pretty straightforward, it was designed to leave no room for interpretation, so if an individual tried to 'amend' its meaning (attempt to use it to justify something in a contrived way) they'd probably just be called out for bullshitting. Conversely, it's rather routine for politicians and the judiciary to reinterpret, stretch and change the meaning of the constitution to fit whatever principles they're asserting, and that's because they can do that with a constitution.
To be honest I think the NAP is already pretty entrenched in our societies' moral sensibilities, partly because of how much our societies' moral sensibilities rely on/are drawn from liberalism. However, we also live in 'over-socialized' societies that demand a higher standard of morality in personal conduct than anyone can live up to, which goes some part of the way towards accounting for how the NAP can be entrenched in its 'un-amended' form in a society where no one actually follows it consistently.
Edited for clarity.