Special provisions are coded with numbers and/or letters and
numbers. Numeric-only codes are multi-modal in application
and may apply to both bulk and non-bulk packaging. Alpha/
numeric codes are specific to a particular transportation mode
or a particular type of packaging. In the example highlighted
here, the code IB2 concerns special provisions involving
intermediate bulk containers. The T4 code concerns special
provisions involving intermodal portable tanks, and the TP1
code concerns special provisions involving portable tanks.
Review §172.102(a) and (b) to learn more about these special
provisions.