The clear implication is that the Commonwealth should wait until after the Zimbabwean presidential election and act on the basis of the report of its own observer mission.
However, if they called an election to act as a mandate for an in or out referendum on leaving Europe, they would probably win five more years in power.
Watergate precipitated the next wave of campaign-finance reform, the Federal Election Campaign Act Amendments of 1974, which supplemented the 1971 law and created much of the regulatory structure that endures today.