diff --git a/ifrs17/Constants/Validations.ipynb b/ifrs17/Constants/Validations.ipynb
index 70075269..5f77b612 100644
--- a/ifrs17/Constants/Validations.ipynb
+++ b/ifrs17/Constants/Validations.ipynb
@@ -77,7 +77,7 @@
                 "\n    // Data Note State",
                 "\n    ChangeDataNodeState, InactiveDataNodeState,",
                 "\n    // Parameters",
-                "\n    ReinsuranceCoverageDataNode, DuplicateInterDataNode, DuplicateSingleDataNode, InvalidDataNode, InvalidDataNodeForOpening, InvalidCashFlowPeriodicity, MissingInterpolationMethod, InvalidInterpolationMethod, InvalidEconomicBasisDriver, InvalidReleasePattern,",
+                "\n    ReinsuranceCoverageDataNode, DuplicateInterDataNode, DuplicateSingleDataNode, MissingSingleDataNodeParameter, InvalidDataNode, InvalidDataNodeForOpening, InvalidCashFlowPeriodicity, MissingInterpolationMethod, InvalidInterpolationMethod, InvalidEconomicBasisDriver, InvalidReleasePattern,",
                 "\n    // Storage",
                 "\n    DataNodeNotFound, PartnerNotFound, PeriodNotFound, RatingNotFound, CreditDefaultRateNotFound, MissingPremiumAllocation, ReinsuranceCoverage, ",
                 "\n    YieldCurveNotFound, YieldCurvePeriodNotApplicable, EconomicBasisNotFound, AccountingVariableTypeNotFound, InvalidGric, InvalidGic, ReleasePatternNotFound,",
@@ -155,6 +155,7 @@
                 "\n    (Error.ReinsuranceCoverageDataNode    , 2) => $\"Invalid Reinsurance Coverage parameter does not link a GroupOfReinsuranceContract to a GroupOfInsuranceContract. Provided GroupOfContracts are: {s[0]}, {s[1]}.\",",
                 "\n    (Error.DuplicateInterDataNode         , 2) => $\"Duplicated Inter-DataNode parameter for {s[0]}-{s[1]} is found.\",",
                 "\n    (Error.DuplicateSingleDataNode        , 1) => $\"Duplicated Single-DataNode parameter for {s[0]} is found.\",",
+                "\n    (Error.MissingSingleDataNodeParameter , 1) => $\"Single DataNode Parameter for Data Node {s[0]} is not found.\",",
                 "\n    (Error.InvalidDataNode                , 1) => $\"Data imported for invalid Data Node {s[0]}.\",",
                 "\n    (Error.InvalidDataNodeForOpening      , 1) => $\"Data imported for invalid Data Node or for a Data Node after its inception year {s[0]}.\",",
                 "\n    (Error.InvalidCashFlowPeriodicity     , 1) => $\"Invalid CashFlowPeriodicity parameter for Data Node {s[0]}.\",",
diff --git a/ifrs17/Import/ImportStorage.ipynb b/ifrs17/Import/ImportStorage.ipynb
index 822e0ce0..c9a56321 100644
--- a/ifrs17/Import/ImportStorage.ipynb
+++ b/ifrs17/Import/ImportStorage.ipynb
@@ -319,6 +319,9 @@
                 "\n",
                 "\n    public DataNodeData GetDataNodeData(ImportIdentity id) => DataNodeDataBySystemName[id.DataNode];",
                 "\n",
+                "\n    public SingleDataNodeParameter GetSingleDataNodeParameter(ImportIdentity id, int period) => SingleDataNodeParametersByGoc.TryGetValue(id.DataNode, out var singleDataNodeParameter)",
+                "\n            ? singleDataNodeParameter[period] : (SingleDataNodeParameter)ApplicationMessage.Log(Error.MissingSingleDataNodeParameter, id.DataNode);",
+                "\n    ",
                 "\n    public (int Year, int Month) GetReportingPeriod(int period) => period == CurrentPeriod ?",
                 "\n                                                                                CurrentReportingPeriod :",
                 "\n                                                                                period == PreviousPeriod ? ",