If you create an HTML cell in a form section and select the button feature, entering a condition into "applicable when" does not incorporate that condition.
As a workaround, I attempted to manually enter it into the HTML using the following in red based on what I learned about applicability from exporting to XML, but I get a syntax error.
<button class="k-primary aw_custom_form_button" data-ref="<operation name="View Primary Reason" type="start_process" operand="ViewReasonFromForm" parameters="AssertionReason" applicability_condition="AssertionReason.PrimaryReason.Name <> '' AND (InitiativeCondition.Initiative.Sponsor=LoggedInPerson OR LoggedInPerson.Role.Conditions='Responsible (Full)&apos😉" image_cls="fa fa-edit" display_text="false"> <description>View Primary Reason</description> </operation>">
</button>
I got ID>0 instead of Name<>'' (shown below) to not give me a syntax error, but it still doesn't hide the button:
<button class="k-primary aw_custom_form_button" data-ref="<operation name="View Primary Reason" type="start_process" operand="ViewReasonFromForm" parameters="AssertionReason" applicability_condition="AssertionReason.PrimaryReason.ID>0 AND (InitiativeCondition.Initiative.Sponsor=LoggedInPerson OR LoggedInPerson.Role.Conditions='Responsible (Full)&apos😉" image_cls="fa fa-edit" display_text="false"> <description>View Primary Reason</description> </operation>">
</button>