The package provides the commands to flag chapters or sections (or anything else destined to become a TOC line). The command \nexttocwithtags{req1,req2,...}{excl1,excl2,...} specifies which tags are to be required and which ones are to be excluded by the next \tableofcontents (or equivalent) command. In a document that uses a class where \tableofcontents may only be used once, the command \tableoftaggedcontents{req1,req2,...}{excl1,excl2,...} may be used to provide several tables.