The rules that use the category "<css_section_echelon>" are:

<section_type-not_creatable-sing>

<css_section_echelon>

<section_type-num_all>

<css_section_echelon>

<section_type-pl>

<css_section_echelon>

<section_type-not_creatable>

<css_section_echelon>

<section_type-sing>

<css_section_echelon>

<section_type-not_creatable-num_all>

<css_section_echelon>

<section_type-not_creatable-pl>

<css_section_echelon>

<section_type-creatable-sing>

<css_section_echelon>