<xpath expr="//field[@name='occupation_id']" position="replace">
<field name="occupation_id" on_change="onchange_occupation_id(occupation_id)" domain="[('domain','=', 'occupation')]" attrs="{'required': [('is_company','=', False)]}" widget="selection"/>
<field name="is_student"/>
<xpath expr="//field[@name='occupation_id']" position="replace">
<field name="occupation_id" on_change="onchange_occupation_id(occupation_id)" domain="[('domain','=', 'occupation')]" attrs="{'required': [('is_company','=', False)]}" widget="selection"/>
<field name="is_student"/>