diff --git a/wifi/hostapd/1.2/IHostapd.hal b/wifi/hostapd/1.2/IHostapd.hal
index b25ea97..5e6d80a 100644
--- a/wifi/hostapd/1.2/IHostapd.hal
+++ b/wifi/hostapd/1.2/IHostapd.hal
@@ -57,6 +57,7 @@
          * used with HE.
          */
         bool enable80211AX;
+
         /**
          * Whether 6GHz band enabled or not on softAp.
          * Note: hw_mode=a is used to specify that 5 GHz band or 6 GHz band is
@@ -96,6 +97,21 @@
     };
 
     /**
+     * Parameters to specify the channel frequency range for ACS.
+     */
+    struct AcsFrequencyRange {
+        /**
+         * Channel Frequency (in MHz) at the start of the range.
+         */
+        uint32_t start;
+
+        /**
+         * Channel Frequency (in MHz) at the end of the range.
+         */
+        uint32_t end;
+    };
+
+    /**
      * Parameters to control the channel selection for the interface.
      */
     struct ChannelParams {
@@ -103,6 +119,15 @@
          * Band to use for the SoftAp operations.
          */
         bitfield<BandMask> bandMask;
+
+        /**
+         * This option can be used to specify the channel frequencies (in MHz) selected by ACS.
+         * If this is an empty list, all channels allowed in selected HW mode
+         * are specified implicitly.
+         * Note: channels may be overridden by firmware.
+         * Note: this option is ignored if ACS is disabled.
+         */
+        vec<AcsFrequencyRange> acsChannelFreqRangesMhz;
     };
 
     /**
@@ -113,9 +138,15 @@
          * Baseline information as defined in HAL 1.1.
          */
         @1.1::IHostapd.IfaceParams V1_1;
-        /** Additional Hw mode params for the interface */
+
+        /**
+         * Additional Hw mode params for the interface
+         */
         HwModeParams hwModeParams;
-        /** Additional Channel params for the interface */
+
+        /**
+         * Additional Channel params for the interface
+         */
         ChannelParams channelParams;
     };
 
@@ -135,7 +166,7 @@
      *         |HostapdStatusCode.FAILURE_IFACE_EXISTS|
      */
     addAccessPoint_1_2(IfaceParams ifaceParams, NetworkParams nwParams)
-        generates(HostapdStatus status);
+        generates (HostapdStatus status);
 
     /**
      * force one of the hotspot clients disconnect..