diff --git a/ch07_authorization-authentication.adoc b/ch07_authorization-authentication.adoc
index 3b7d1815..7a74e06a 100644
--- a/ch07_authorization-authentication.adoc
+++ b/ch07_authorization-authentication.adoc
@@ -754,7 +754,7 @@ transaction((("scripts", "OP_RETURN", startref="script-op-return")))((("OP_RETUR
 [[lock_time_limitations]]
 ==== Transaction Lock Time Limitations
 
-Use of the lock time allows a spender to restrict a transaction from
+Use of the ((("transactions", "timelocks", "limitations of")))((("timelocks", "limitations of")))((("lock time", "limitations of")))lock time allows a spender to restrict a transaction from
 being included in a block until a specific block height, but it does not
 prevent spending the funds in another transaction earlier than that.
 Let's explain that with the following example.
@@ -773,7 +773,7 @@ It is important to understand the limitations of transaction lock time. The only
 
 ==== Check Lock Time Verify (OP_CLTV)
 
-In December 2015, a new form of
+In ((("transactions", "timelocks", "verifying", id="transaction-timelock-op-cltv")))((("timelocks", "verifying", id="timelock-op-cltv")))((("lock time", "verifying", id="lock-time-op-cltv")))((("OP_CLTV  script operator", id="op-cltv")))((("verifying", "lock time", id="verify-lock-time")))December 2015, a new form of
 timelock was introduced to Bitcoin as a soft fork upgrade. Based on a
 specification in BIP65, a new script operator called
 _OP_CHECKLOCKTIMEVERIFY_ (_CLTV_) was added to the scripting language.
@@ -880,7 +880,7 @@ By introducing timelock functionality directly into the scripting
 language, +OP_CLTV+ allows us to develop some very interesting complex
 scripts.
 
-The standard is defined in
+The standard((("transactions", "timelocks", "verifying", startref="transaction-timelock-op-cltv")))((("timelocks", "verifying", startref="timelock-op-cltv")))((("lock time", "verifying", startref="lock-time-op-cltv")))((("OP_CLTV  script operator", startref="op-cltv")))((("verifying", "lock time", startref="verify-lock-time"))) is defined in
 https://oreil.ly/YmJGD[BIP65
 (OP_CHECKLOCKTIMEVERIFY)].