Transference copy transmission requires steamer agents to submit two copies with mate receipts and Boarding Office to dispatch ICD copies. Steamer agents must submit two sets of transference copies of shipping bills with mate receipts to the TA/STA at the Boarding Office, which will acknowledge receipt, forward copies to the Boarding Officer for endorsement against mate receipts, retain one set for dispatch to the concerned ICD in a sealed cover (by Speed Post or approved agent) and forward the other set to the MCD Section; the Boarding Office must maintain ICD-specific folders and registers and dispatch copies ICD-wise preferably on the 15th and 30th of each month.