when is the money "deposited"

[K2retire]

I'm having a stress moment. Is a contribution considered to be deposited when received by the recordkeeper, or when postmarked?

[Kevin C]

From a footnote to preamble for the 1996 final deposit regulations:

\6\ Where, for example, an employer mails a check to the plan, the Department is of the view that the employer has segregated participant contributions from plan assets on the day the check is mailed to the plan, provided that the check clears the bank.

http://benefitslink.com/erisaregs/403.html

[Belgarath]

Has the IRS ever formally adopted the DOL's sensible approach on this? (And this might be the only time you ever see "DOL" and "sensible" in the same sentence)