Field help (REP_SQH) 

The sales reps are initialized by the customer sales reps, then by those of the ship-to customer, if no sales rep exists in the customer record. In the case of a prospect, only the prospect's sales representatives will be considered. These sales rep codes will be copied to the quote lines. If a representative is modified in the quote header when this is created or if quote lines exist in the quote, the system will propose to copy the modification to all the lines that already exist.