<%= specialist_sector_fields do |sectors| %>
  <fieldset class="edition-specialist-sector-fields">
    <legend>
      <strong>ALPHA:</strong> Specialist sectors (this is an evolving feature,
      <a href="https://insidegovuk.blog.gov.uk/2014/02/20/new-specialist-sector-option-in-publisher/">read more in our blog post</a>)
    </legend>
    <%= form.label :primary_specialist_sector_tag %>
    <%= form.select :primary_specialist_sector_tag,
                    specialist_sector_options_for_select(sectors),
                    {},
                    { class: 'chzn-select',
                      data: { placeholder: 'Choose specialist sectors…' } } %>

    <%= form.label :secondary_specialist_sector_tags, 'Additional specialist sectors' %>
    <%= form.select :secondary_specialist_sector_tags,
                    specialist_sector_options_for_select(sectors),
                    {},
                    { multiple: true,
                      class: 'chzn-select',
                      data: { placeholder: 'Choose specialist sectors…' } } %>
  </fieldset>
<% end %>

<%= specialist_sector_fields do |sectors| %>
  <fieldset class="edition-specialist-sector-fields">
    <legend>
      <strong>ALPHA:</strong> Specialist sectors (this is an evolving feature,
      <a href="https://insidegovuk.blog.gov.uk/2014/02/20/new-specialist-sector-option-in-publisher/">read more in our blog post</a>)
    </legend>
    <%= form.label :primary_specialist_sector_tag %>
    <%= form.select :primary_specialist_sector_tag,
                    specialist_sector_options_for_select(sectors),
                    { include_blank: true },
                    { class: 'chzn-select',
                      data: { placeholder: 'Choose specialist sectors…' } } %>

    <%= form.label :secondary_specialist_sector_tags, 'Additional specialist sectors' %>
    <%= form.select :secondary_specialist_sector_tags,
                    specialist_sector_options_for_select(sectors),
                    {},
                    { multiple: true,
                      class: 'chzn-select',
                      data: { placeholder: 'Choose specialist sectors…' } } %>
  </fieldset>
<% end %>

Allow no selection of a primary specialist sector.
Allow no selection of a primary specialist sector.