As a possible was around these application cautions. As the load is a one time migration, would anyboby know if they can be turned off in the forms?
If there were, they would most likely be implemented as System Profile Options - I know that such things exist for certain NI number validation rules. Go to the System Profile Options screen in the System Admin Responsibility and look for anything beginning 'HR%'
Having said that, my own personal opinion is that going down this route is a dangerous game to play. OK if you're doing a one-off load into an empty, not-yet-live system, as long as you have a specific step in your transition plan to switch all these checks back on again! The problem is, though, how would you know you've covered all the possible rules the load process is to encounter, until you come to do the load for real? what if you come across a situation for which there is no option, or any other legitimate means to disable the rule?
I do think we need to come up with a way of trapping the message and allowing the process to carry on anyway. If you can post the code items again (I think the issue has been resolved now that prevented me from seeing it the first time) then maybe that will shed some light on matters.