@maestroI quoted our runners who said why the Czechs were DQ. I checked the official results and Czechs were DQ based on Rule 24.8 which is an illegal crossover change which means impeding another team. Lane infridgements are in the section 17, not 24.
Section 24 is for relays & baton exchanges.
24.1-24.3 - technical rules for realys (distance, changeover zone lenght etc.)
24.4 - lane running on first leg
24.5 - baton parameters
24.6 - no gloves rule / permission to leave the lane if baton is dropped
24.7 - passing baton in changeover zone / DQ for passing outside of the zone (more common in 4x100)
24.8 - baton change in lane / not impeding another team
24.9 - DQ for picking up another team's baton if dropped
24.10 - one athlete runs one leg
...
24.19 - DQ for starting to run outside of the zone before baton is exchanged (usually results in 24.7 breach anyway).
24.8 rule reads:
24.8 Until the moment when the baton is in the hand of only the receiving athlete, Rule
17.3 of the Technical Rules shall be applicable only to the incoming athlete.
Thereafter it shall be applicable only to the receiving athlete.
Additionally, athletes before receiving and/or after handing over the baton, should
keep in their lanes or maintain position until the course is clear to avoid obstruction to
other athletes. Rules 17.3 and 17.4 of the Technical Rules shall not apply to these
athletes. If, however, an athlete impedes a member of another team, including by
running out of position or lane, Rule 17.2 of the Technical Rules shall be applied.
Rule 17.2 is for jostling/obstruction and/or causing another competitor to fall - not applied here since neither of the Poles actually fell.
PS. Yes, I am bored to have checked the rulebook