diff --git a/apps/st/src/components/statistics/input/PublicSewageFacilityInp.tsx b/apps/st/src/components/statistics/input/PublicSewageFacilityInp.tsx
index 4197084bb..509ab5db6 100644
--- a/apps/st/src/components/statistics/input/PublicSewageFacilityInp.tsx
+++ b/apps/st/src/components/statistics/input/PublicSewageFacilityInp.tsx
@@ -173,6 +173,10 @@ function normalizePrxyCtrtCn(raw: unknown): string | null {
     return s;
 }
 
+function isMainFacilityRow(row: Record<string, string | number>): boolean {
+    return String(row.isMainYn ?? '').toUpperCase() === 'Y';
+}
+
 function isValidPrxyCtrtCn(value: string | null): boolean {
     if (value === null) return true;
     if (!/^\d{8}~\d{8}$/.test(value)) return false;
@@ -1540,13 +1544,25 @@ const PublicSewageFacilityInp = () => {
                                     showHeaderCheckbox={false}
                                     enableSort={false}
                                     cellStyleCallback={({ row, fieldName }) => {
+                                        const lockPrxyCtrtCn =
+                                            fieldName === 'prxyCtrtCn' && isMainFacilityRow(row);
                                         const verification = (row as GridRowWithVerification).verificationResult;
-                                        if (!verification) return;
-                                        const errors = verification[fieldName];
-                                        if (Array.isArray(errors) && errors.length > 0) {
-                                            const hasImr = errors.some((e) => e.vrfcCd === "IMR" || e.vrfcCd === "HB");
-                                            return hasImr ? "rg-cell-verify-error-imr" : "rg-cell-verify-error";
+                                        let verifyStyle: string | undefined;
+                                        if (verification) {
+                                            const errors = verification[fieldName];
+                                            if (Array.isArray(errors) && errors.length > 0) {
+                                                const hasImr = errors.some((e) => e.vrfcCd === "IMR" || e.vrfcCd === "HB");
+                                                verifyStyle = hasImr ? "rg-cell-verify-error-imr" : "rg-cell-verify-error";
+                                            }
                                         }
+                                        if (lockPrxyCtrtCn) {
+                                            return {
+                                                editable: false,
+                                                readOnly: true,
+                                                styleName: [verifyStyle, 'rg-cell-readonly'].filter(Boolean).join(' ') || 'rg-cell-readonly',
+                                            };
+                                        }
+                                        return verifyStyle;
                                     }}
                                     footerVerificationResult={
                                         footerVerificationByTab.get(tab.tabKey) ?? null
diff --git a/apps/st/src/components/statistics/verification/generalVerification/FomulaDialog.tsx b/apps/st/src/components/statistics/verification/generalVerification/FomulaDialog.tsx
index 1fbe87806..4bfacc36b 100644
--- a/apps/st/src/components/statistics/verification/generalVerification/FomulaDialog.tsx
+++ b/apps/st/src/components/statistics/verification/generalVerification/FomulaDialog.tsx
@@ -761,7 +761,7 @@ const FomulaDialog = ({ open, onOpenChange, data, trgtStatsCd, trgtStatsNm, allo
                         onClick={() => {
                             if (isUserDirectInputMode) {
                                 setFormulaSaveError(null);
-                                const raw = formulaDisplaySegments.join("");
+                                const raw = formulaDisplaySegments.join("").replace(/\s+/g, "");
                                 const wrapped = wrapWithBacktick(raw);
                                 const isEmptyFormula = raw.trim().length === 0;
                                 const refStats = resolveRefStatsForConfirm(isEmptyFormula);
diff --git a/apps/st/src/components/util/column/input/PublicSewageFactInpColumn/PublicSewageFactColumn.ts b/apps/st/src/components/util/column/input/PublicSewageFactInpColumn/PublicSewageFactColumn.ts
index 6efaed0c1..db1c9e73e 100644
--- a/apps/st/src/components/util/column/input/PublicSewageFactInpColumn/PublicSewageFactColumn.ts
+++ b/apps/st/src/components/util/column/input/PublicSewageFactInpColumn/PublicSewageFactColumn.ts
@@ -170,6 +170,7 @@ export const PublicSewageFactColumn = {
         { name: 'admdstNm', fieldName: 'admdstNm', header: { text: '행정구역명' }, visible: false, editable: false, styleName: 'rg-cell-readonly' },
         { name: 'fcltSn', fieldName: 'fcltSn', header: { text: '처리시설일련번호' }, visible: false, editable: false, valueType: ValueType.TEXT, styleName: 'rg-cell-readonly' },
         { name: 'swtrmtFcltCd', fieldName: 'swtrmtFcltCd', header: { text: '하수처리시설코드' }, visible: false, editable: false, styleName: 'rg-cell-readonly' },
+        { name: 'isMainYn', fieldName: 'isMainYn', header: { text: '중심처리시설여부' }, visible: false, editable: false, styleName: 'rg-cell-readonly' },
     ],
 
     columnLayout: [
@@ -271,6 +272,7 @@ export const PublicSewageFactColumn = {
         'admdstCd',
         'fcltSn',
         'swtrmtFcltCd',
+        'isMainYn',
     ],
     rowStartNum: 3,
     fixedColumns: 2,
diff --git a/apps/st/src/entities/statistics/model/input/statistics-public-sewage-facility-input-interface.ts b/apps/st/src/entities/statistics/model/input/statistics-public-sewage-facility-input-interface.ts
index 96b1a6abc..91cc5e920 100644
--- a/apps/st/src/entities/statistics/model/input/statistics-public-sewage-facility-input-interface.ts
+++ b/apps/st/src/entities/statistics/model/input/statistics-public-sewage-facility-input-interface.ts
@@ -35,6 +35,7 @@ export interface PublicSewageFacilityItem {
     sggNm: string;
     admdstNm: string;
     fcltSn: number;
+    isMainYn: string;
     swtrmtFcltCd: string;
     swtrmtFcltNm: string;
     fcltPstnCn: string | null;
diff --git a/apps/st/src/entities/statistics/model/verification-input-report-interface.ts b/apps/st/src/entities/statistics/model/verification-input-report-interface.ts
index 0af515cbf..ad5ceae35 100644
--- a/apps/st/src/entities/statistics/model/verification-input-report-interface.ts
+++ b/apps/st/src/entities/statistics/model/verification-input-report-interface.ts
@@ -29,7 +29,6 @@ export interface VerificationInputReportItem {
     rsnExpln: string;
     nowVlCn: string;
     compVlCn: string | null;
-    vrfcStatusNm: string;
 }
 
 export interface VerificationInputReportPageInfo {