Section 529 - Consolidated lien index1. In counties having a population of less than five hundred thousand, the county clerk may install and maintain a single consolidated index, in lieu of all other indices required by law, for the purpose of indexing alphabetically all liens or encumbrances affecting real property recorded or filed in his office, except mortgages, lis pendens and judgments.2. A county clerk may adopt a new indexing system utilizing electro-mechanical, electronic or any other method he deems suitable for maintaining the indexes.