If payment service is selectable, then all payment services are selectable.
If article is selectable, then all articles are selectable.
If tariff is selectable:
All tariffs are selectable if there is no current article.
All tariffs are selectable if there is a current article and
<ARTICLE selectFromAllTariffs="true">
All tariffs in current article are selectable if there is a current article and <ARTICLE selectFromAllTariffs="false">>
