diff --git a/README.rst b/README.rst
index 391158fb..77d1cd34 100644
--- a/README.rst
+++ b/README.rst
@@ -118,6 +118,7 @@ Index of ZIPs
400 | Wallet.dat format | Draft |
401 | Addressing mempool denial-of-service | Final |
402 | New Wallet Database Format | Reserved |
+
403 | Verification Behaviour of zcashd | Reserved |
1001 | Keep the Block Distribution as Initially Defined — 90% to Miners | Obsolete |
1002 | Opt-in Donation Feature | Obsolete |
1003 | 20% Split Evenly Between the ECC and the Zcash Foundation, and a Voting System Mandate | Obsolete |
diff --git a/index.html b/index.html
index c29eb437..9177696e 100644
--- a/index.html
+++ b/index.html
@@ -91,6 +91,7 @@
400 | Wallet.dat format | Draft |
401 | Addressing mempool denial-of-service | Final |
402 | New Wallet Database Format | Reserved |
+
403 | Verification Behaviour of zcashd | Reserved |
1001 | Keep the Block Distribution as Initially Defined — 90% to Miners | Obsolete |
1002 | Opt-in Donation Feature | Obsolete |
1003 | 20% Split Evenly Between the ECC and the Zcash Foundation, and a Voting System Mandate | Obsolete |
diff --git a/zip-0403.html b/zip-0403.html
new file mode 100644
index 00000000..885951a1
--- /dev/null
+++ b/zip-0403.html
@@ -0,0 +1,16 @@
+
+
+
+ ZIP 403: Verification Behaviour of zcashd
+
+
+
+
+
+
\ No newline at end of file
diff --git a/zip-0403.rst b/zip-0403.rst
new file mode 100644
index 00000000..7baa5bd2
--- /dev/null
+++ b/zip-0403.rst
@@ -0,0 +1,7 @@
+::
+
+ ZIP: 403
+ Title: Verification Behaviour of zcashd
+ Status: Reserved
+ Category: Informational
+ Discussions-To: