Holding multiple visas possible?

[puterguy]

I'm curious if it's possible to hold both a H1B and a TN visa for different employers, concurrently. If "no", where is this outlined in law? (NAFTA?)

Where in law is self-employment through TN prohibited? (specific sections)

 

[puterguy]

Eh... forget the last point, I see it in http://travel.state.gov/visa/temp/types/types_1274.html#6. Regardless, how "deep" does self-employement go, I wonder? Partnership?

 

[TheRealCanadian]

I'm curious if it's possible to hold both a H1B and a TN visa for different employers, concurrently. If "no", where is this outlined in law?

You can only be admitted to the US under a single status. Either H-1B, or TN.

Where in law is self-employment through TN prohibited? (specific sections)

Self-employment in a tax sense is perfectly acceptable. However, self-employment in terms of "self-sponsorship" of the TN is not.