China's top legislature has expressed strong dissatisfaction towards Hong Kong's High Court ruling that the Emergency Regulations Ordinance is "incompatible" with the Basic Law.

The National People's Congress (NPC) is the sole legislative body that can make judgments and decisions over whether a law of the Hong Kong Special Administrative Region (HKSAR) is in accordance with the Basic Law, said Zang Tiewei, a spokesperson for the Commission of Legislative Affairs of NPC on Tuesday.

No other office has the right to make such judgments and decisions, Zang pointed out.

The Emergency Regulations Ordinance grants the city's chief executive the power to "make any regulations whatsoever" on "occasions of emergency or public danger." Chief Executive of HKSAR Carrie Lam in October introduced a face mask ban to "create a deterrent effect against masked, violent protesters and rioters."

Beijing has voiced support for Lam's move, calling it necessary to combat and end violent criminal acts and restore social order.

Beijing: HK's 'anti-mask law' is necessary for restoring social order

"In the past four months, almost all protesters who carried out vandalism and violence had their faces covered. And the purpose was to hide their identity and evade the law, and they have become more and more daring," Lam said when introducing the ban on October 4.