In addition to printing a complete index within and for each two-year period, as provided in Section 2180, the county elections official may print and maintain one complete and continuing index, by precinct, to the affidavits of registration and keep the index current by supplements and deletions as provided in Sections 2180 and 2183, and by reprinting portions of the index by precinct, as the need appears, the reprinted portions to contain the same information concerning each voter and to be in the same style, spacing, and type of print as provided in Section 2180.