I need to make CSV import option (for all models) only available to certain security groups in Odoo v8.

How to do that? Any hint?

--- UPDATE ---

So far:

I have created a specific security group and category for CSV import.

A) No security rules

I cannot create security rules over TransientModels (Why? Whyyyy?), therefore I cannot use this over base_import.import model. (Damn! That would have been easy for once!)

B) No xml "groups" allowed for non-visual elements

In addons/base_import/views/base_import.xml there are these lines:

<template id="assets_backend" name="base_import assets" inherit_id="web.assets_backend">
    <xpath expr="." position="inside">
        <link rel="stylesheet" href="/base_import/static/src/css/import.css"/>
        <script type="text/javascript" src="/base_import/static/lib/javascript-state-machine/state-machine.js"></script>
        <script type="text/javascript" src="/base_import/static/src/js/import.js"></script>
    </xpath>
</template>

But, even I can modify that xpaths and avoid those link and 2 scripts, I cannot make it group-based optional using "groups" attribute, as it is completely ignored (Does "groups" only apply to visual elements like fields, divs, groups and so?)

C) Is it even possible to check groups with t-if? No clue how.

In addons/base_import/static/src/xml/import.xml there are these lines:

    <t t-extend="ListView.buttons">
    <t t-jquery="span.oe_alternative">
        this.attr('t-if', 'widget.options.import_enabled');
    </t>
    <t t-jquery="span.oe_alternative" t-operation="append">
        <a href="#" class="oe_bold oe_list_button_import">Import</a>
    </t>
    </t>

But once again, I have no clue how to add a t-if for that "a href" checking if current user belongs to a specific group I have created for csv import.

Documentation says nothing about hot to check it in QWeb views.

D) JS? Really?

Haven't even tried it. Should be easier.