How to (re)initialze a Collection Table

I need to re-initialze the table in the following code sample. The rows in the table are retaining subscript data, so I need the collection cleared before the next population of data.

Procedure Main_Procedure is

i_bom_component_tbl   Bom_Bo_Pub.Bom_Comps_Tbl_Type := bom_bo_pub.g_miss_bom_component_tbl;
v                     Number :=0;
v_Bill_Sequence_id    Number :=0;

Begin

    For BOM_Rec in BOM_Csr(v_Bill_Sequence_id) Loop

        v := v + 1;

      -- Component detail data assignments. 
        i_bom_component_tbl(v).Transaction_Type :='UPDATE';
        i_bom_component_tbl(v).Start_Effective_Date := BOM_REC.Effectivity_Date;