It can't enable anything without federal oversight via a constitutional amendment. Voting is within the purview of each individual state, so the states in this compact have no oversight on their peers (let alone the powers to demand a recount or rerun the election).
For example, let's say 20 states make up exactly 270 EC votes. The popular vote within those states (if allocated proportional to votes) ends up as 136/270 to candidate X. The other 30 states report universal support for candidate Y.
By rights, Y should win with 402 EC votes and 74% of the popular vote. But if the compact chooses to ignore those states as fraudulent then candidate X wins with a mere 26%.
Similar fuckery can happen with late reporting of votes or a state in the compact reneging on the agreement and voting against the rest. There's absolutely nothing binding about this, it's just a pinky promise among these states.