diff --git a/zip-0207.rst b/zip-0207.rst
index 15b65846..ea3f92c5 100644
--- a/zip-0207.rst
+++ b/zip-0207.rst
@@ -47,8 +47,16 @@ Specification
 Definitions
 -----------
 
-- ``PostBlossomHalvingInterval`` as-defined in [#zip-0208]_.
+We use the following constants and functions defined in [#zip-0208]_:
+
+- ``BlossomActivationHeight``
+- ``PostBlossomHalvingInterval``
+- ``Halving(height)``
+
+We also define the following constants and functions:
+
 - ``SlowStartShift`` as-defined in [#block-subsidy]_.
+- ``HeightForHalving(halving)``: Smallest ``height`` such that ``Halving(height) = halving``
 
 Funding streams
 ---------------
@@ -132,16 +140,15 @@ Stream definitions
 The three consensus-defined funding streams described above each start at the Blossom activation height, and
 end at the first block reward halving. They are defined as follows:
 
-======== =============== ================= ================== ===============================================
- Stream  Value numerator Value denominator    Start height                      End height
-======== =============== ================= ================== ===============================================
-ZECC EF        737              1000       Blossom activation ``SlowStartShift + PostBlossomHalvingInterval``
-  ZF E         144              1000       Blossom activation ``SlowStartShift + PostBlossomHalvingInterval``
-ZECC SR        119              1000       Blossom activation ``SlowStartShift + PostBlossomHalvingInterval``
-======== =============== ================= ================== ===============================================
+======== =============== ================= =========================== =======================
+ Stream  Value numerator Value denominator        Start height               End height
+======== =============== ================= =========================== =======================
+ZECC EF        737              1000       ``BlossomActivationHeight`` ``HeightForHalving(1)``
+  ZF E         144              1000       ``BlossomActivationHeight`` ``HeightForHalving(1)``
+ZECC SR        119              1000       ``BlossomActivationHeight`` ``HeightForHalving(1)``
+======== =============== ================= =========================== =======================
 
 - To-do: specify the correct values.
-- To-do: specify the correct start height.
 
 The sets of recipient addresses are defined as follows:
 
@@ -196,8 +203,7 @@ Example implementation
         consensus.vFundingPeriods[Consensus::FS_ZECC_EF].valueDenominator = 1000;
         consensus.vFundingPeriods[Consensus::FS_ZECC_EF].startHeight =
             consensus.vUpgrades[Consensus::UPGRADE_BLOSSOM].nActivationHeight;
-        consensus.vFundingPeriods[Consensus::FS_ZECC_EF].endHeight =
-            (consensus.nSubsidySlowStartInterval / 2) + consensus.nSubsidyPostBlossomHalvingInterval;
+        consensus.vFundingPeriods[Consensus::FS_ZECC_EF].endHeight = HeightForHalving(consensus, 1);
         assert(consensus.vFundingPeriods[Consensus::FS_ZECC_EF].valueNumerator <
             consensus.vFundingPeriods[Consensus::FS_ZECC_EF].valueDenominator);
         assert(consensus.vFundingPeriods[Consensus::FS_ZECC_EF].startHeight <
@@ -208,8 +214,7 @@ Example implementation
         consensus.vFundingPeriods[Consensus::FS_ZF_E].valueDenominator = 1000;
         consensus.vFundingPeriods[Consensus::FS_ZF_E].startHeight =
             consensus.vUpgrades[Consensus::UPGRADE_BLOSSOM].nActivationHeight;
-        consensus.vFundingPeriods[Consensus::FS_ZF_E].endHeight =
-            (consensus.nSubsidySlowStartInterval / 2) + consensus.nSubsidyPostBlossomHalvingInterval;
+        consensus.vFundingPeriods[Consensus::FS_ZF_E].endHeight = HeightForHalving(consensus, 1);
         assert(consensus.vFundingPeriods[Consensus::FS_ZF_E].valueNumerator <
             consensus.vFundingPeriods[Consensus::FS_ZF_E].valueDenominator);
         assert(consensus.vFundingPeriods[Consensus::FS_ZF_E].startHeight <
@@ -220,8 +225,7 @@ Example implementation
         consensus.vFundingPeriods[Consensus::FS_ZECC_SR].valueDenominator = 1000;
         consensus.vFundingPeriods[Consensus::FS_ZECC_SR].startHeight =
             consensus.vUpgrades[Consensus::UPGRADE_BLOSSOM].nActivationHeight;
-        consensus.vFundingPeriods[Consensus::FS_ZECC_SR].endHeight =
-            (consensus.nSubsidySlowStartInterval / 2) + consensus.nSubsidyPostBlossomHalvingInterval;
+        consensus.vFundingPeriods[Consensus::FS_ZECC_SR].endHeight = HeightForHalving(consensus, 1);
         assert(consensus.vFundingPeriods[Consensus::FS_ZECC_SR].valueNumerator <
             consensus.vFundingPeriods[Consensus::FS_ZECC_SR].valueDenominator);
         assert(consensus.vFundingPeriods[Consensus::FS_ZECC_SR].startHeight <