diff --git a/specification/logs/data-model.md b/specification/logs/data-model.md
index f7f50e74e7e..36301aeb27b 100644
--- a/specification/logs/data-model.md
+++ b/specification/logs/data-model.md
@@ -121,14 +121,13 @@ Value of type `any` can be one of the following:
 Value of type `[]keyval<string, any>` is a collection of key-value pairs with
 string keys and [`any`](#type-any) values.
 
-Arbitrary deep nesting of values for arrays and key-value collections is allowed
-(essentially allows to represent an equivalent of a JSON object).
+Arbitrary deep nesting of values for arrays and key-value collections MUST be
+allowed (essentially allows to represent an equivalent of a JSON object).
 
 The type representation is language-dependent.
 It is implementation-specific whether the collection can contain duplicated keys.
 If the implementation allows having duplicates, then some exporters (e.g. OTLP)
-may require deduplication (removing pairs so that there are none of them have
-the same key).
+may require deduplication (removing pairs so that none of them have the same key).
 
 ### Field Kinds