Is THIS claim by Jason Cherniak true ?

Can anyone confirm this?

[...] just the [rumour that Olivia Chow won because NDP supporters from across the city voted early and often at different polling stations in Trinity-Spadina] led the federal Liberals to fight for a new rule that voters must show ID before receiving their ballot.

Did Stephane Dion's Liberal Party base a new policy on a rumour?

Keep me posted!