Elon Musk, the CEO of SpaceX, announced on Monday that a crucial Starship Super Heavy rocket launch test is now more likely to happen later this month rather than this week.

SpaceX plans to use Starship as a fully reusable spacecraft to transport people and goods to Mars, the moon, and Earth orbit. The company’s fully stacked, 394-foot (120-meter) tall Starship rocket system is set to launch for the first time from SpaceX’s Starbase facilities in Boca Chica, South Texas. Completely stacked refers to having all of its components integrated and the higher stage perched above the booster.

Musk tweeted the following day that the launch of the starship was “awaiting regulatory approval” and that it was “heading towards near the end of third week of April.”

The launch was noted as having a backup date of Tuesday this week and a primary expected date of Monday in a planning notice published by the Federal Aviation Administration (FAA) on April 4. Starship will launch this week, according to Musk’s statement from last week.

The launch may now take place on April 17, according to an amended notification that the FAA released on Monday.

For what is anticipated to be its first orbital flight test from Boca Chica, SpaceX still needs to obtain a launch permit from the FAA. The conclusion of a federal environmental compliance examination is still a significant obstacle.

The “Super Heavy” first stage booster with 33 rocket engines serves as the base for the Starship rocket, which is mounted atop it. The Starship second stage will be launched into space, where it will orbit the Planet completely before returning to Earth’s atmosphere and splashing down off the coast of Hawaii. The Super Heavy booster would also be expected to land in Texas close to the launch site.