# OED fields The input fields for each OED file, grouped by file. A field's requirement level depends on the line of business, so there is one status column per line — **Property**, **Cyber**, **Liability** and **Marine Cargo** — each taking one of: ```{list-table} :header-rows: 0 :widths: 10 90 * - `R` - Required * - `O` - Optional * - `CR` - Conditionally required (required in certain circumstances — see the field description) * - `n/a` - Not applicable to this file / line of business ``` ```{include} _generated/oed_fields.md ```