From the "Welcome News" for CP Employees (2000):
Be sure to bring along:
Passport OR Driver's License OR School Picture ID
AND
Birth Certificate OR Original Social Security Card
It doesn't say it has to be the original birth certificate, however. I have a "birth record" that you can get from the county clerk in your town -- it has the embossed seal and works as a birth certificate. It's certainly understandable that you wouldn't want to take the original!
NOTE: This info if from 2000, but after 3 seasons of working for CP, it doesn't tend to change!
Hope that helped!
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PO!NT OF VIEW - A Different Look at Roller Coasters
http://www.crosswinds.net/~justmayntz/thrills/