The government has been urged by a group of musicians and MPs to permit on-site drug testing at UK festivals.
In the open letter, ministers are urged to "reconsider" the Home Office's demand for a special license.
It states that since 2014, safety testing has taken place without these permits and that it "unquestionably saves lives.".
The Home Office claims that since 2001, drug testers have been required to hold licenses, and that this hasn't changed.
Since Parklife in Manchester earlier this month, a debate on the subject has been simmering.
Despite doing so since 2014, festival boss Sacha Lord claimed that this year's testing of seized drugs and alerting attendees to any safety concerns were not possible.
When he was informed that the event would require a license for the first time, he claimed that the Home Office, which is in charge of drug policy, had made a "u-turn.".
The open letter, which also includes the signatures of 31 politicians and musicians like Fatboy Slim, Billy Bragg, and members of the band Metronomy, was signed by Sacha and other individuals associated with the festival industry.
A number of Tory MPs are among the group who call "blocking" testing a "disastrous decision.".
According to them, obtaining a license costs money and takes more than three months to plan.
Additionally, they claim that because the terms require drug testing to take place in a permanent structure, it is challenging for festivals held at temporary locations to comply.
The majority of UK festival organizers support drug testing.
Testing is a way to lessen harm even though they claim not to support or encourage drug use among festival attendees.
The letter urges the government to reinstate "back-of-house" drug testing, which involves examining seized drugs for potency, contamination, and possible misselling.
Festival-goers are issued a warning if issues are discovered.
Most testing in previous years was carried out by the nonprofit The Loop, in accordance with contracts with regional councils and police.
Drug testing will be conducted this year through a private company, Glastonbury, which took place over the weekend, informed Newsbeat.
Also announcing its intention to offer it this year is the organization behind the Leeds and Reading Festivals.
BBC Newsbeat has been informed that this will take place off-site in accordance with license requirements.
The Home Office has consistently denied claims that it has reversed course and insists that its testing policy is unambiguous.
We still hold the same position, it says. To test for controlled drugs, including at festivals, drug testing companies need a license.
"We have always been clear about this requirement, and law enforcement has always had a duty to uphold this legal requirement.
"No applications for drug testing at the major festivals this summer have been submitted," the spokesperson said. With any prospective applicants, we will keep the lines of communication open. ".
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