The reasons from the bill why it was fraudulent:

(A) was held under undemocratic conditions that did not meet international standards

(B) involves government malfeasance and serious irregularities with ballot counting and the reporting of election results including:

i. early voting ballot stuffing

ii. ballot burning

iii. pressuring poll workers and

iv. removing bags full of ballots by climbing out windows

(C) included restrictive measures that impeded the work of local independent observers

There was a little more, but I’m working from a screenshot from a friend and don’t know the page numbers. Hopefully someone else who is not on their phone can search out more of the details.

Edit: Have page numbers to confirm: starts on page 5040 under “Subtitle C—Support for Human Rights in Belarus”