Prime Minister Mark Carney told Anglo American PLC that it had to move its headquarters to Canada or its proposed acquisition of Teck Resources Ltd. TECK-B-T would not be allowed to proceed, two sources familiar with the matter told The Globe and Mail.

London-based Anglo last week unveiled an all-stock takeover of Vancouver-based Teck worth approximately US$20-billion. In an unusual move, Anglo said it would move its HQ to Vancouver once the deal closed.

Mr. Carney also made it clear in his conversations with Anglo American that the requirement to move headquarters to Canada would be a bar that any company planning on buying Teck would have to hit, the sources said.

The Globe and Mail is not identifying the sources because they were not authorized to speak publicly.

Audrey Champoux, a spokesperson for Mr. Carney, declined to comment.

James Wyatt-Tilby, senior vice-president, corporate affairs with Anglo, declined to comment.