The Sangguniang Bayan of the Municipality of Sampaloc, Quezon, passed an ordinance imposing a storage fee of ten centavos (P0.10) for every 100 kilos of copra deposited in any bodega within the Municipality's jurisdiction. The Metropolitan Manufacturing Corporation (MMC), with principal office in Makati, is engaged in the manufacture of soap, edible oil, margarine, and other coconut oil-based products. It has a warehouse in Sampaloc, Quezon, used as storage space for the copra purchased in Sampaloc and nearby towns before the same is shipped to Makati. MMC goes to court to challenge the validity of the ordinance, demanding the refund of the storage fees it paid under protest. Is the ordinance valid? Explain your answer.