It started in 1974 with one young lawyer, Al Perez, a native of Brownsville, Texas, who made this connection: If the Voting Rights Act of 1965 had ushered in greater political participation for African Americans nine years earlier, why couldn’t the same thing be done for the disenfranchised Mexican Americans of his home state?

The benefits of the 1965 Voting Rights Act on African Americans was evident. Before it passed, fewer than a third of African Americans in the Southern states covered by the Voting Rights Act were registered to vote; two years later, that number was up to 52 percent.

Elected office now seemed within reach for African Americans — only five African Americans served in Congress in 1965; 10 years later, that number had increased to 17 and many were serving in local positions. The Voting Rights Act had accomplished much in short order.

In 1975, Perez’s boss at the Mexican American Legal Defense and Educational Fund, Vilma Martinez, testified before Congress that in Texas, only two percent of Mexican Americans held any kind of local, state or federal office. Other witnesses said that election officials often turned away eligible Mexican American voters. There were unannounced changes in polling places, or polling places that were difficult to reach. In some cases, Mexican Americans who became politically active lost their jobs.

Congress later that year expanded the scope of the Act to protect language minorities from voting discrimination. Congress defined “language minority” to mean “persons who are American Indian, Asian American, Alaskan Natives or of Spanish heritage.”

That was an enormous step forward for Latinos. It advanced the civil rights of Mexican Americans, it established Latinos on the national stage, and most importantly, it put local and state officials on notice that they could not circumvent the intent of the law.

It’s now been 40 years since the passage of the 1975 expansion that added protections to language minorities in Alaska, South Dakota, Texas, Arizona, California, Florida and New York, a remarkable accomplishment for the minority electorate.

But today, the Voting Rights Act is essentially toothless in protecting the voting rights of minorities.

In 2013, the U.S. Supreme Court ruled 5-4 to overturn the formula used to administer Section 5, the “preclearance” provision of the Voting Rights Act that calls on local and state governments to secure federal approval before instituting changes. Since then, new challenges to voting rights have emerged, often as state voter ID laws.

So in what way might the most helpful part of the Voting Rights Act be reinstated to ensure greater minority participation? The two most likely avenues are not so promising.

President Barack Obama has called on Congress to restore the Voting Rights Act, but the chances of that happening are remote. Equally iffy is a legal challenge that has been filed with the Supreme Court that would essentially neutralize the basic tenets of the law. Proponents believe that the Supreme Court ought to take the case and strike down voter discrimination once and for all. But whether the highest court would accept the case and then come down on the side of greater protections is anyone’s guess.

In light of that, it’s time for the same resourcefulness that created the 1975 legislation. Political parties must not only ask for the Latino vote; they must also make serious efforts to ask Latinos what they think and what they want — and then invest in mobilizing Latinos.

And Latinos must demonstrate resourcefulness in getting people to vote. One group in Texas is organizing an effort to get volunteers to drive 10 voters to the polls in 2016. That commitment is exactly what is called for. Efforts must be made so that Latino political gains made since 1975 are not lost: Latinos must be fully integrated into their communities, their state and the country at all levels.

The Latino electorate won’t be starting from zero. The advancements made during the 40 years since the 1975 Voting Rights Act reaped substantial positives. It all began because one young Brownsville native had the audacity to ask: why not Texas? Now we just need to protect it and foster more change so that the voting rights of all Texans are not lost.