EXHIBIT 31.1Cronos Global Income Fund XVRule 13a-14 Certifications     I, Dennis J. Tietz, certify that:     1. I have reviewed this annual report on Form 10-K of Cronos Global Income Fund XV (the“Partnership”);     2. Based on my knowledge, this annual report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statements made, in light ofthe circumstances under which such statements were made, not misleading with respect to the periodcovered by this annual report;     3. Based on my knowledge, the financial statements, and other financial information includedin this annual report, fairly present in all material respects the financial condition, results ofoperations and cash flows of the Partnership as of, and for, the periods presented in this annualreport;     4. The other certifying officer of Cronos Capital Corp. (“CCC”), the General Partner of thePartnership, and I are responsible for establishing and maintaining disclosure controls andprocedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control overfinancial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Partnershipand we have:          (a) designed such disclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that material information relating tothe Partnership, including its consolidated subsidiaries, is made known to us by others withinthose entities, particularly during the period in which this quarterly report is being prepared;          (b) designed such internal control over financial reporting, or caused such internal controlover financial reporting to be designed under our supervision, to provide reasonable assuranceregarding the reliability of financial reporting and the preparation of financial statements forexternal purposes in accordance with U.S. generally accepted accounting principles;          (c) evaluated the effectiveness of the Partnership’s disclosure controls and procedures andpresented in this annual report our conclusions about the effectiveness of the disclosure controlsand procedures, as of the end of the period covered by this report based on such evaluation; and          (d) disclosed in this report any change in the Partnership’s internal control over financialreporting that occurred during the Partnership’s most recent fiscal quarter (the Partnership’sfourth fiscal quarter in the case of an annual report) that has materially affected, or isreasonably likely to materially affect, the Partnership’s internal control over financialreporting.     5. CCC’s other certifying officer and I have disclosed, based on our most recent evaluationof internal control over financial reporting, to the Partnership’s auditors and the Audit Committeeof Partnership’s Board of Directors (or persons performing the equivalent function):          (a) all significant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely to adversely affect thePartnership’s ability to record, process, summarize and report financial information; and          (b) any fraud, whether or not material, that involves management or other employees who havea significant role in the Partnership’s internal control over financial reporting.Date:March 7, 2008   /s/ DENNIS J. TIETZ Dennis J. Tietz  President and Director of CCC