<li><a href="#concept-tariffs">11.2. Tariffs</a></li>
<li><a href="#concept-market-tariff">11.3. Market tariff</a></li>
<li><a href="#concept-civils">11.4. Civil costs</a></li>
<li><a href="#concept-concost">11.5. Connection costs</a></li>
<li><a href="#concept-demand">11.6. Annual and peak demand</a></li>
<li><a href="#concept-tank-factor">11.7. Tank factor</a></li>
<li><a href="#concept-heat-loss">11.8. Pipe heat loss</a></li>
<li><a href="#concept-diversity">11.9. Diversity / coincidence</a></li>
<li><a 