statement_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>


    <record id="statement_importer_view_form" model="ir.ui.view">
        <field name="name">account.statement.profile.view</field>
        <field name="model">account.statement.profile</field>
        <field name="inherit_id" ref="account_statement_ext.statement_importer_view_form"/>
        <field name="arch" type="xml">
            <field name="bank_statement_prefix" position="after">
                <separator colspan="4" string="Import related infos"/>
                <field name="launch_import_completion"/>
                <field name="last_import_date"/>
                <field name="import_type"/>
                <button name="%(account_statement_base_import.statement_importer_action)d"
                                                        string="Import Bank Statement"
                                                        type="action" icon="gtk-ok"
                                                        colspan = "2"/>
                <group attrs="{'invisible': [('rec_log', '=', False)]}">
                    <separator colspan="4" string="Historical Import Logs"/>
                    <field name="rec_log" colspan="4" nolabel="1" />
                </group>
            </field>
        </field>
    </record>


   <record id="bank_statement_view_form" model="ir.ui.view">
         <field name="name">account_bank_statement.bank_statement.view_form</field>
         <field name="model">account.bank.statement</field>
         <field name="inherit_id" ref="account_statement_base_completion.bank_statement_view_form" />
         <field eval="20" name="priority"/>
         <field name="arch" type="xml">
             <xpath expr="//field[@name='line_ids']/form//field[@name='account_id']" position="attributes">
                 <attribute name="attrs">{'required': [('already_completed','=', True)]}</attribute>
             </xpath>
             <xpath expr="//field[@name='line_ids']/tree//field[@name='account_id']" position="attributes">
                 <attribute name="attrs">{'required': [('already_completed','=', True)]}</attribute>
             </xpath>
         </field>
     </record>

</data>
</openerp>