Oracle dataguard vs active dataguard clarification

Hello,

We have dataguard configure on  11GR2 .   We have 1 standby database running in remote server.       We would like to temporarily open it in read only mode  to check the consistency .   My question is , does enabling standby database in read only mode without apply ,  require active dataguard license.   The process , I am thinking is as follows

ALTER DATABASE RECOVER MANAGED

Oracle instance CANCEL;

open read only;

run required queries.

shutdown database

startup mount

ALTER DATABASE RECOVER MANAGED Oracle instance DISCONNECT FROM SESSION;

Does this require additional license?

Thanks

Ram