{% if part.bom_checked_date %}
{% if part.is_bom_valid %}
{% else %}
The BOM for {{ part.full_name }} has changed, and must be validated.
{% endif %}
The BOM for {{ part.full_name }} was last checked by {{ part.bom_checked_by }} on {{ part.bom_checked_date }}
{% else %}
The BOM for {{ part.full_name }} has not been validated.