In downstream oil and gas, LPG: the giving and taking among industry players of LPG cylinders bearing other trademarks or trade names at an accredited LPG cylinder swapping center [Section 4(ff), LPG Industry Regulation Act of 2021; Section 3.1(gg) of DOE-DTI Joint Department Circular No. JDC2022-05-001, Rules and Regulations Implementing Republic Act No. 11592]
