Block Checkout for "The shipping rate cannot be determined at this time $0.00"

[mybaby]

Hello,

We would like to know if:

a. There is an option to disable checkout if the "Shipping rate cannot be determined".
b. Otherwise, how to manually disable checkout.

Thank you

[mc12345678]

This would be shipping module dependent and would be something to capture within the processing provided by that shipping module such that it would perform some sort of self check to validate that acceptable information has been made available to the customer and if not then the shipping module becomes disabled and/or deselected which is expected to cause checkout to stop moving forwards as one requirement has historically been that at least one payment module and one shipping module be active and selected.