Will and would modal verbs

1). A majority of voters approved changes to Russia’s constitution that would allow president valdmir putin to hold power until 2036.

2). A majority of voters approved changes to Russia’s constitution that will allow president valdmir putin to hold power until 2036.

Which of the following sentences is correct?? If both are correct, What is the difference in meaning between these two sentences???

I know as the sentence is in past tense we should use "would". But as the constitution is still allowing and will allow for some time in future , can’t we use "will"???