Peru are 2000 percent certain to go to Russia
The suggestion that a proposed change to Peruvian law could contravene FIFA’s rules is unfounded. If such a measure were proposed, the political party that came up with it would die. The current draft of the law will probably be changed, although we don't know exactly to what effect. What I can say with certainty is that there will not be a law that prevents Peru going to the 2018 World Cup in Russia.
Bill in question is still in draft phase
The bill is in the draft phase and a lot of things can still change. Nothing is clear (beyond the rumours) of what it will contain. The players’ federation had shown concern, because the plan to “strengthen the autonomy of the Peruvian Football Federation (FPF)”, went too far, providing a blank sheet for the Federation re-elections.
That also received criticism, and as such, it is premature to postulate as to how the final draft of the bill will look. But we can be certain that it will not be intrusive. The rule that the president has to have a university degree won't be included.
Peru must be at the World Cup
The Peruvian state does not subsidise football, and it is therefore treated differently to other sporting federations that do receive subsidies, which must be regulated. Or at least, to the extent of the amount of the subsidy.
Where there is consensus is that the re-election is authorised, even if that is not official; hence why the FPF is aiming to hold elections, the details of which are undefined. The FPF also wants to change the complexion of the governing assembly, which is currently made up with 33 percent coming from the professional ranks and 66 percent from the amateur game.
I do not want say any more than to strongly reject any possibility that Peru will not be at the World Cup. THERE MUST BE NO LAW that interferes with the business of the FPF, and Peru will therefore be going to the World Cup with 2000 percent certainty.