The union representing striking security guards at the Bank of Canada has filed a new unfair labour practice complaint, alleging the central bank is continuing to employ contract guards despite a federal order to cease doing so.

The complaint to the Canada Industrial Relations Board claims that non-employees are performing the duties of the striking unionized officers, directly contravening the board's previous directive.

This development escalates the ongoing labour dispute, which has already seen the board order the Bank of Canada to stop using contracted Garda security personnel while the strike remains active.

The conflict highlights operational tensions within the central bank as it navigates the security strike.

While the board's initial order aimed to prevent the use of replacement workers, the union's latest filing suggests the central bank has not fully complied, potentially exposing the institution to further regulatory scrutiny or penalties.

Market participants are monitoring the situation for any potential disruption to the Bank of Canada's operations, although the immediate financial impact remains unclear.