# Row Level Security

Malloy models can have parameters called [Givens](https://docs.malloydata.dev/documentation/experiments/givens).

In Mprove, givens can be defined at a Project level. They override defaults set in Malloy files.

Also, Givens can be assigned to an [Access Role](/content/docs/access-roles).

Each project member can have multiple access roles. Therefore, for each Given, project member can have multiple values to choose from.

User can select values for each Given in "Project" >> "Selected Givens" page.

Selected Givens applied to each user query.