Anomaly Score Mode and blocking

I am trying the latest ruleset with Modsecurity and use crs-setup.conf.example (https://github.com/coreruleset/coreruleset/blob/v3.3/dev/crs-setup.conf.example) as an example but it seems that blocking never triggers.

As in the documentation described https://www.modsecurity.org/CRS/Documentation/anomaly.html the section :

SecAction
"id:’900004′,
phase:1,
nolog,
pass,
t:none,
setvar:tx.anomaly_score_blocking=on"

Need to be enabled but that not seem to be the case as in CRS 3.2 this section does not exists.

Is it something else need to be change to enable blocking ? Is it something enabled by default ?

Thanks in advanced.