HAVANA -- Cubans formed long lines outside travel agencies and migration offices in Havana on Monday as a highly anticipated new law took effect ending the island's much-hated exit visa requirement.

The measure means the end of both real and symbolic obstacles to travel by islanders, though it is not expected to result in a mass exodus. Most Cubans are now eligible to leave with just a current passport and national identity card, just like residents of other countries.

It's a tangible benefit for people like Ester Ricardo, a 68-year-old Havana resident who was granted a U.S. tourist visa but denied an exit permit. She queued up early outside the office of a charter airline eager to book a flight to Miami as soon as possible.

"My niece invited me, so I'm going on a family visit," said Ricardo, who plans to be in Florida for around six months. "I'm not going to stay forever. I have a daughter here."

And there have been signs that even islanders in sensitive roles -- or open opposition to the Communist government -- will be included, a key litmus test of the reforms' scope. Two well-known Cuban dissidents said they were told they will now be allowed to travel after being blocked multiple times in the past.

Control over who can travel now largely shifts to other governments which will make their own decisions about granting entry visas. Cubans, like people in most other developing countries, will still find it difficult in many cases to get visas from wealthier nations like the U.S. Several European diplomats in Havana said their embassies have received a high volume of calls from would-be travelers unaware that they would still need a visa, despite a campaign in official Cuban media to clarify the new requirements.

Cuba observers and foreign governments have been waiting to see how the government implements the law to gauge its effect. The measure contains language that lets the government deny travel in cases of "national security," and one key test of the law will be whether authorities allow exits in sensitive cases such as military officers and scientists.

"We will see if this is implemented in a very open way, and if it means that all Cubans can travel," said Roberta Jacobson, U.S. assistant secretary of state for Western Hemisphere affairs. "If it is implemented in such a manner, it would be a very, very positive" reform.

At Havana's international airport, bustling with Cuban-American travelers returning home after spending the holidays with family on the island, people praised the change but said there are still obstacles like cost and the difficulty of getting an entry visa.

"I would like to travel and be with my family," said Maria Eugenia Jimenez, who was seeing off her sister who lives in Miami. "They (the U.S.) turned me down for a visa because I could be a possible immigrant. ... Now the problem is with the other countries, not with Cuba."

The United States has a target of issuing 20,000 migrant visas per year to Cubans and processes tourist visa applications on a case-by-case basis.

However, many thousands of Cubans have obtained dual Spanish citizenship through ancestral claims in recent years, and as such are eligible to travel to the United States without a visa.