Tow vs. Toe the Line

I've seen this phrase used in both forms on web sites, in articles, books, brochures, etc. I know from
discussions/histories that 'toe' is the original form, but observe that both "toe the line" and "tow the line" have basically
the same application and meanings when used. My question is, "officially"...and I realize that could vary from
authority to authority...are both forms as used today considered correct and acceptable, or
is using 'tow' instead of 'toe' only a sign of ignorance/poor usage?

Regards,
Mike

Replies