> For the complete documentation index, see [llms.txt](https://docs.totalmateria.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.totalmateria.com/green-line/bom/load-a-bill-of-materials.md).
# Load a Bill of Materials
The starting page is divided into three sections for easy access to recently saved BOMs and Compliance statements (showing the last five with a link to "View all").
Loading a BOM brings you to the BOM main page, where all saved details such as the BOM tree, validation messages, and assessment statuses are displayed. Selecting the "View all" link navigates to the Saved BOMs section in My Console.
In the third section of the BOM starting page, the last five Compliance Statements are listed with options to edit or delete.
If a statement is in use within a saved BOM, it cannot be deleted (indicated by a greyed-out delete icon).
Compliance statements are shared among users within the same company, meaning if one user saves a statement, all Green Line users from the same company can see it. However, no one can delete a statement while it is in use. Users can also add a new compliance statement through a link to “View all” Compliance Statements.
Users have the option to download a template file for BOM creation, but the system is flexible, allowing for the import of custom BOM files in any language and column order. While the template provides a suggested structure, only four columns are mandatory:
* **Level**
* **Part Number**
* **Part Name**
* **Material**
All other columns are optional, allowing flexibility. During import, users must map the Excel columns to the Total Materia BOM fields.
If no standard is specified for the materials in the imported file, users can choose a default standard on the starting page, which will apply automatically to materials without an assigned standard.
For custom materials with unique compositions, ensure the Excel file is formatted properly, with substances listed one level lower than the material. Each substance should have its CAS number, concentration, and unit provided.
After the file import, the users will land on the BOM main page with the default Compliance mode. If they are interested in sustainability, they have to select Carbon Footprint from the drop-down.
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