What does "Also key would be the introduction of a law" mean? It sounds not natural (English)

Context:
Acid attacks are rising in Pakistan, with Acid Survivors Foundation recording 48 cases in 2009 and countless more probably go unreported because of social stigma. That is up from about 30 cases in 2007, a rise could be blamed on increased stress in people's lives as inflation soars. Acid attacks are at an all time high in Pakistan and increasing every year. The Pakistani attacks are typically the work of husbands against their wives who have "dishonored them." Also key would be the introduction of a law requiring the attacker to pay for their victim's painful and expensive treatment and counseling. Still in 2010, the nation remains without a domestic violence law. It has been drafted, but lawmakers say it is still under debate as a senator from a hard line Islamic party raised objections and sent the bill back to parliament. Because of its easy accessibility to the general public, for very stupid domestic issues they will just throw acid on each other. It does not only destroy a person's face but it destroys a person's life. Naila Farhat was just 13 years old when a man threw acid in her face in 2003 because her parents refused to let him marry their child. The attacker was sentenced to 12 years in prison and ordered to pay 1.2 million rupees (14,250 dollars) in damages, but on appeal a high court reduced the damages and said the man could go free once the money was paid. Enraged, Farhat and ASF went to the Supreme Court -- the first acid attack case to be taken to the highest court -- where judges overturned the high court ruling within minutes. PHOTO BEHROUZ MEHRI / AFP JANUARY 2010