ASC X12 004010

629 Alternation Precedence Code
TYPE=ID MIN=1 MAX=1

Code identifying the priority of rate application when two or more rates apply to a given movement; if rate application includes two or more rates of the same value for this element, individual carrier rules and procedures shall govern


A        Indicates Alternation between all Lower Levels
B        Price Application Hierarchy Rules Apply - Do Not Alternate between Levels
L        A rate with this element indicating an "L" value will be applied only in the 
         absence of rate application by any with this element indicating "N" or "S"
N        A rate with this element indicating an "N" value will be applied to the 
         exclusion of all other rates with this data element indicating other values
P        Only Applicable for Contracts - Indicates that Alternation between Levels 
         applies to Contracts and Customer Specific Prices ("CT" and "PR") Only
S        A rate with this element indicating an "S" value will be applied to the 
         exclusion of all other rates except those indicated as "N"