Because IUCLID is intended to be used for different kinds of chemical regulatory programmes, which have differently structured data requirements, a IUCLID-specific table of contents for the data entry sections was designed. An overview of all IUCLID sections is given in chapter D.4.7 How to manage Endpoint study records in sections 4 - 13. Guides to where to enter data required according to REACH, OECD HPV and BPD are provided in the following subchapters, including the programme-specific numbers and titles of data points vs. the corresponding IUCLID sections.