diff --git a/current.txt b/current.txt
index dc57c67..3a9abe8 100644
--- a/current.txt
+++ b/current.txt
@@ -27,14 +27,6 @@
 c93cb25a1a92d07aa80a617c01e8d22fc97bf8cefd3962b6a5be386ad4704d89 android.hardware.audio.effect@2.0::IVirtualizerEffect
 918f331780c9c7b04f2151a2e563aab088198ede8e6f865302ebaa13905bd9ce android.hardware.audio.effect@2.0::IVisualizerEffect
 4caad099f8fc00262b6c03ba41271808b37cea90ac98b534299bbf4ee823af02 android.hardware.audio.effect@2.0::types
-f2904a4c108ad1b93eb2fa4e43b82bd01ce1ff26156316e49d1d9fc80dfecaad android.hardware.automotive.evs@1.0::IEvsCamera
-94cba6ad04c83aa840de2ed52b74ba2126a26dd960225e61ac36703315279a80 android.hardware.automotive.evs@1.0::IEvsCameraStream
-5ea36fb043d9e3b413219de3dfd7b046b48af4fda39f167f3528652e986cb76d android.hardware.automotive.evs@1.0::IEvsDisplay
-14ef8e993a4a7c899b19bb5e39b5b0cafd28312ea2b127e35b3be8f08e23fe8e android.hardware.automotive.evs@1.0::IEvsEnumerator
-3b17c1fdfc389e0abe626c37054954b07201127d890c2bc05d47613ec1f4de4f android.hardware.automotive.evs@1.0::types
-cde0787e4bf4b450a9ceb9011d2698c0061322eb882621e89b70594b0b7c65c5 android.hardware.automotive.vehicle@2.0::IVehicle
-80fb4156fa91ce86e49bd2cabe215078f6b69591d416a09e914532eae6712052 android.hardware.automotive.vehicle@2.0::IVehicleCallback
-248004f0832b48199558bd5d1aacc29e7e6423dd0ff6012be142e23621f03f4b android.hardware.automotive.vehicle@2.0::types
 1fbdc1f852f8bd2e4a6c5cb30ac2b78668c98dce118a61762d4034ae859f43d8 android.hardware.biometrics.fingerprint@2.1::IBiometricsFingerprint
 aabb5c3c585592d71ee57b77298c14993d77914ddeaa64b2c5109a602b02ea47 android.hardware.biometrics.fingerprint@2.1::IBiometricsFingerprintClientCallback
 1ec60d4efddae9a7b2469278a576967b4751e88de5b8d7e9df6eff6bc0da7bc9 android.hardware.biometrics.fingerprint@2.1::types
@@ -189,7 +181,6 @@
 
 # ABI preserving changes to HALs during Android O MR1 (Initial Set)
 
-26a4dd19a71f3a28249100af29be470f80e08355165fe6a7173aaa1ef264640d android.hardware.automotive.vehicle@2.0::types
 150a338ce11fcec70757c9675d83cf6a5d7b40d0c812741b91671fecce59eac9 android.hardware.broadcastradio@1.0::types
 dc7e6d4f537b9943e27edc4f86c5a03bb643b18f18f866f8c3c71c0ac4ea8cbc android.hardware.broadcastradio@1.0::types
 760485232f6cce07f8bb05e3475509956996b702f77415ee5bff05e2ec5a5bcc android.hardware.dumpstate@1.0::IDumpstateDevice
@@ -260,8 +251,10 @@
 c8bc853546dd55584611def2a9fa1d99f657e3366c976d2f60fe6b8aa6d2cb87 android.hardware.thermal@1.1::IThermalCallback
 
 # ABI preserving changes to HALs during Android P
+d4c10cb28318dba8efb22231a8c23e86ad8853f85775187c40b42a878a5ef4d5 android.hardware.automotive.vehicle@2.0::types
+cf72ff5a52bfa4d08e9e1000cf3ab5952a2d280c7f13cdad5ab7905c08050766 android.hardware.camera.metadata@3.2::types
 6fa9804a17a8bb7923a56bd10493a5483c20007e4c9026fd04287bee7c945a8c android.hardware.gnss@1.0::IGnssCallback
 fb92e2b40f8e9d494e8fd3b4ac18499a3216342e7cff160714c3bbf3660b6e79 android.hardware.gnss@1.0::IGnssConfiguration
 251594ea9b27447bfa005ebd806e58fb0ae4aad84a69938129c9800ec0c64eda android.hardware.gnss@1.0::IGnssMeasurementCallback
-d4c10cb28318dba8efb22231a8c23e86ad8853f85775187c40b42a878a5ef4d5 android.hardware.automotive.vehicle@2.0::types
-cf72ff5a52bfa4d08e9e1000cf3ab5952a2d280c7f13cdad5ab7905c08050766 android.hardware.camera.metadata@3.2::types
+4e7169919d24fbe5573e5bcd683d0bd7abf553a4e6c34c41f9dfc1e12050db07 android.hardware.gnss@1.0::IGnssNavigationMessageCallback
+
diff --git a/gnss/1.0/IGnssNavigationMessageCallback.hal b/gnss/1.0/IGnssNavigationMessageCallback.hal
index 3fdae9f..24ee708 100644
--- a/gnss/1.0/IGnssNavigationMessageCallback.hal
+++ b/gnss/1.0/IGnssNavigationMessageCallback.hal
@@ -119,7 +119,8 @@
          *
          * - For Galileo F/NAV, this refers to the page type in the range 1-6
          *
-         * - For Galileo I/NAV, this refers to the word type in the range 1-10+
+         * - For Galileo I/NAV, this refers to the word type in the range 0-10+
+         * A value of 0 is only allowed if the Satellite is transmiting a Spare Word.
          */
         int16_t submessageId;