pos/pos_restricted_customer_list/views/res_partner.xml

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

    <record id="view_partner_form" model="ir.ui.view">
        <field name="name">view.partner.form.pos.available</field>
        <field name="model">res.partner</field>
        <field
            name="inherit_id"
            ref="point_of_sale.view_partner_property_form"
            />
        <field name="arch" type="xml">
            <field name="ean13" position="before">
                <field name="available_in_pos"/>
            </field>
        </field>
    </record>

</data></openerp>