woocommerce_sections_(current_tab) action-hook . WC 1.0

Usage

add_action( 'woocommerce_sections_(current_tab)', 'action_function_name_6389' );
function action_function_name_6389(){
	// action...
}

Where the hook is called

do_action( 'woocommerce_sections_' . $current_tab );

Where in WP core the hook is used WooCommerce

add_action( 'woocommerce_sections_' . $this->id, array( $this, 'output_sections' ) );

add_action( 'woocommerce_sections_' . $this->id, array( $this, 'output_sections' ) );