How many collations can fit in one period?

In the sharding spec, I find no limits on the number of collations per shard per period.

Does this mean, the eligible proposer can add dozens of collations in a block of the main chain? If yes, is COLLATION_GASLIMIT effective? If no, what conditions am I failing to consider?

One collation per shard per period.


I saw your update! Thanks.