The language of the 2nd and 4th "if" statement in step 3 of subclause 8.3.4.3 is vague and not precise, as it is really difficult to know what "first occurance of the reference picture" actually means.

I propose editorial to change Step 3 of Subclause 8.3.4.3 as follows:

Replace
– If the entry RefPicListL0[ refIdxL0 ] is the first occurance of the reference picture,

PredLCToPredLx[ refIdxLC ] = Pred_L0, (8 12)

.....

with
– If the element RefPicList0[ refIdxL0 ] is not in the reference picture list RefPicList2,

RefPicList2[ refIdxL2 ] = RefPicList0[ refIdxL0 ], (8 12)
PredL2ToPredLx[ refIdxL2 ] = Pred_L0,

......

And similarly, replace

– If the entry RefPicListL1[ refIdxL1 ] is the first occurance of the reference picture,

PredLCToPredLx[ refIdxLC ] = Pred_L1, (8 13)

.....

with

– If the element RefPicList1[ refIdxL1 ] is not in the reference picture list RefPicList2,

RefPicList2[ refIdxL2 ] = RefPicList1[ refIdxL1 ], (8 13)
PredL2ToPredLx[ refIdxL2 ] = Pred_L1,

......

Also note that there is a defect in the List name RefPicList0 and RefPicList1, they sometimes appear as RefPicListL0 and RefPicListL1.
I suggest that all occurances of RefPicListL0 and RefPicListL1, be replaced with RefPicList0 and RefPicList1, to be consistent with the AVC text.

While we are at it, we may as well change the following variable names....... as "LC" and "lc" are not good variables as they are used elsewhere for other tools.

PredLCToPredLx to PredL2ToPredLx
RefIdxLCToRefIdxLx to RefIdxL2ToRefIdxLx
num_ref_idx_lc_active_minus1 to num_ref_idx_l2_active_minus1
ref_pic_list_modification_flag_lc to ref_pic_list_modification_flag_l2
refIdxLC to refIdxL2 (I already used this above)
mvd_lc to mvd_l2
Pred_LC to Pred_L2
mvp_lc_flag to mvp_l2_flag
luma_weight_lc_flag to luma_weight_l2_flag
delta_luma_weight_lc to delta_luma_weight_l2
luma_offset_lc to luma_offset_l2
chroma_weight_lc_flag to chroma_weight_l2_flag
delta_chroma_weight_lc to delta_chroma_weight_l2
delta_chroma_offset_lc to delta_chroma_offset_l2