The tackle height was lowered to the waist from next season for all levels apart from the Premiership and Championship.
The RFU said in a statement that "detailed guidelines" will be sent out to players, coaches and referees.
"We understand this is a significant change," said a union spokesperson.
However, numerous clubs, players, coaches, and officials have expressed their concerns to the BBC, branding the law change unworkable, lamenting a lack of consultation, and fearing a mass player departure from the sport.
Stokes wrote on Twitter: "Let’s lower the tackle height but bring in a higher chance of the attackers knees hitting defenders in the head. And also let’s take out any consideration for instinctive athleticism in the heat of sport."
2025 Six Nations fixtures confirmed with England handed toughest possible start
England will kick off their 2025 Guinness Six Nations campaign with an away match at the Aviva Stadium against Ireland.
Commenting on the 2025 Guinness Six Nations fixtures, Tom Harrison, CEO of Six Nations Rugby, said:
“The Guinness Men’s Six Nations is an appointment to view each year, delivering blockbuster entertainment for fans all over the world. The Championship never fails to deliver unpredictable excitement and experiences for fans to look forward to and then savour.
"The announcement of the next instalment of fixtures is always keenly anticipated by fans, and with tickets now available for the 2025 fixtures, coupled with extensive broadcast coverage of the games, fans can already begin looking forward to what is in store as the action for the remaining rounds of this year's Championship plays out."
2025 Siz Nations Fixtures
ROUND 1
Friday 31 January
France vs Wales - 8.15pm
Saturday 1 February
Scotland vs Italy - 2.15pm
Ireland vs England - 4.45pm
Jamison Gibson-Park of Ireland spins the ball out during the Autumn Nations Cup match between England and Ireland at Twickenham Stadium, Twickenham, London on November 21 2020. - PHOTO: Phil Mingo/PPAUK
ROUND 2
Saturday 8 February
Italy vs Wales - 2.15pm
England vs France - 4.45pm
Sunday 9 February
Scotland vs Ireland - 3pm
ROUND 3
Saturday 22 February
Wales vs Ireland - 2.15pm
England vs Scotland - 4.45pm
Sunday 23 February
Italy vs France - 3pm
ROUND 4
Saturday 8 March
Ireland vs France - 2.15pm
Scotland vs Wales - 4.45pm
Sunday 9 March
England vs Italy - 3pm
Ollie Lawrence of England is tackled by Tommaso Allan of Italy during the Six Nations Match between England and Italy at Twickenham, London on 12 Feb 2023 (Photo: Tom Sandberg/PPAUK)
ROUND 5
Saturday 15 March
Italy vs Ireland - 2.15pm
Wales vs England - 4.45pm
France vs Scotland - 8pm
AI predicts the next 20 Six Nations winners, Scotland finally win it
Groundbreaking AI technology has unveiled its jaw-dropping forecasts for the next two decades of Six Nations glory, and the results are nothing short of mind-blowing.
According to the cutting-edge predictions, England is poised to clinch victory in a staggering five out of the next 20 tournaments, while Scotland is primed for a historic triumph, marking their first title since their Five Nations conquest in 1999.
However, the road ahead seems daunting for Wales, as the AI oracle forecasts a prolonged wait until 2041 for their next taste of Six Nations glory.
Meanwhile, traditional powerhouses such as England, Ireland, and France are slated to dominate the competition, casting a shadow over Welsh aspirations.
Let’s lower the tackle height but bring in a higher chance of the attackers knees hitting defenders in the head.
And also let’s take out any consideration for instinctive athleticism in the heat of sport