Asuncion: Players will be barred from spitting and must undergo temperature checks before each match under new sanitary guidelines outlined by the South American Football Confederation (CONMEBOL).
The measures, which also include a ban on kissing the ball and recommendations for clubs to reduce the risk of injury to players after three months of inactivity, was sent to CONMEBOL's 10 member federations on Thursday.
CONMEBOL did not set a date for a return to the Copa Libertadores - South America's equivalent of the UEFA Champions League - or the second-tier Copa Sudamericana, however, it said football was "closer".
"We presented a protocol for training, travel and tournaments," the entity tweeted. "It is a contribution for football's return, keeping in mind everyone's health."
The Copa Libertadores and Copa Sudamericana have been suspended since mid-March. The region's opening qualifiers for the 2022 World Cup, which had been scheduled for March, were also postponed indefinitely.
Meanwhile, Colombia's soccer chief and the head of South American football confederation CONMEBOL have written to FIFA complaining of "erroneous and discriminatory conclusions" in the assessment of the country's bid to host the 2023 Women's World Cup.
The Colombian proposal to bring the tournament to South America for the first time received the lowest score in an evaluation of three bids to host the tournament carried out by world soccer's governing body ahead of next Friday's vote.
The joint bid from Australia and New Zealand was rated 4.1 out of five in the report, Japan was adjudged worthy of a 3.9 score but Colombia only 2.8.
A letter to the members of FIFA's ruling council signed by CONMEBOL President Alejandro Dominguez and Ramon Jesurun, who heads up the Colombian Football Federation (CFC), said the report lacked credible sources to support its conclusions.
"In the document, FIFA's administration draws some erroneous and discriminatory conclusions on three aspects of vital importance for the score of our candidacy," read the letter.
