Here is a code snippet from acs-templating/resources/forms/standard.adp with a break. It's ugly and bad practice, but it does work (and I think might point to some places where it might make some sense to have a break tag).
<multiple name="elements">
<if @form_properties.show_required_p@ true>
<if @elements.optional@ nil and @elements.mode@ ne "display" and @elements.widget@ ne "inform" and @elements.widget@ ne "select" and @elements.widget@ ne "h
idden" and @elements.widget@ ne "submit">
<span class="form-required-mark">*</span> #acs-templating.required#
<% break %>
</if>
</if>
</multiple>