what is tentative classification
1 Obtain a tentative shipping classification. 2  SMS will normally issue a tentative shipping classification for the samples to be tested. 3  Normally plan on 1-2 weeks for SMS to review a request for DOT classification and to issue a tentative shipping classification. Normally plan on 1-2 weeks for SMS to review a request for DOT classification and to issue a tentative shipping classification. 2  This depends on the type of classification sought and the information available to make the tentative classification determination.