Can I trade futures/commodities with an IB Canada cash account?

Futures/commodities trading is only available for IB Canada margin accounts.

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Why are margin requirements shown in a cash account, and do cash accounts have margin requirements?
What is the difference between Securities Margin and Commodities Margin?
What accounts are eligible to participate in IBKR's Dividend Reinvestment Program?
I am resident in Canada. Can I trade futures?