Natural Gas Enterprise Act Article 51
When the gas transmission pipelines are affected by corrosion or other phenomena posing safety risks, the natural gas enterprise shall replace them promptly.The competent authorities may dispatch staff or entrust professional institutions to inspect natural gas enterprises' gas transmission pipelines. The enterprises shall not evade, obstruct, or refuse such inspections.By October 31 each year, natural gas enterprises shall prepare a maintenance, inspection, and replacement plan for the gas transmission pipelines for the following year and submit it to the competent authority of the municipality or county (city), which shall subsequently forward the plan to the central competent authority for reference.
中文原文 天然氣事業法第51條
天然氣事業輸氣管線因發生腐蝕或其他現象，有影響安全之虞者，事業應立即汰換。
主管機關得派員或委託專業機構，對於天然氣事業之輸氣管線實施檢測，事業不得規避、妨礙或拒絕。
天然氣事業應於每年十月三十一日前，編具次一年之輸氣管線維修檢測汰換計畫，報經直轄市、縣（市）主管機關轉請中央主管機關備查。
主管機關得派員或委託專業機構，對於天然氣事業之輸氣管線實施檢測，事業不得規避、妨礙或拒絕。
天然氣事業應於每年十月三十一日前，編具次一年之輸氣管線維修檢測汰換計畫，報經直轄市、縣（市）主管機關轉請中央主管機關備查。