Expire is not really the right term; but effectively yes. In general a cheque older than six months will be considered stale-dated and will not be honoured. Reference the Canadian Payments Association FAQ.
SKYACTIV is a brand name for a series of technologies developed by Mazda which increase fuel efficiency and engine output. The initial announcement of the SKYACTIV technologies include new engines, transmissions, body, and chassis, which appeared in Mazda products from 2011.
Proactiv+ is a dermatologist-developed system that targets acne. It starts removing acne-causing bacteria on contact and reduces irritation while providing the skin with premium skin care ingredients. Step 1. Skin smoothing exfoliator Cleanse and exfoliate Fights acne & leaves skin hydrated.